[Troubleshooting] Kobelco excavator faultcode fault code Sep 6, 2014 | Repair Manual How to Kobelco excavator repair SK200-2 SK200-3 fault code: A-1ROM data is bad (not electromechanical A adjustment). A-2 Electrical A bad adjustment. A-3CPU exception. B-1 arm upward pressure sensor is abnormal. B-2, the big arm downward pressure sensor is abnormal. B-3, the arm back pressure sensor is abnormal. B-4, arm extended pressure sensor anomaly. B-5, the bucket back pressure sensor is abnormal. B-6, bucket extended pressure sensor anomaly. B-7, rotary pressure sensor anomaly. B-9, dextral pressure sensor anomaly. B-10, sinistral pressure sensor anomaly. C-1, P1 pump pressure sensor is abnormal. C-2, P2 pump pressure sensor is abnormal. D-1, P1 neutral cut proportional valve abnormalities. D-2, P2 neutral cut proportional valve abnormalities. D-3, the proportion of straight travel valve abnormalities. D-4, a large proportion of boom confluence valve abnormalities (only -2 models). D-5, the proportion of slow rotary valve abnormalities (only -2 models). D-6, the arm of variable renewable proportional valve abnormalities (only -3 models). E-1, P1 pump proportional valve abnormalities. E-2, P2 pump proportional valve abnormalities. F-1, booster valve abnormalities. F-2, the rotating brake solenoid is abnormal. F-3, the traveling speed changeover solenoid valve abnormalities. F-4, FC mode (micro-operations) solenoid valve abnormalities (only -2 models). F-5, walk a straight line solenoid valve abnormalities (only -2 models). G-1, the stepper motor current exception. G-2, the stepper motor without a starting point indexing. G-5, an engine flameout (Show E / G reversal). Kobelco SK200-6 fault code: An electromechanical controller failure. 1-1, instruments and electromechanical controller communication error. 1-2, the battery relay exception. A-1, A is not electromechanical adjustment. A-2, A electromechanical adjustment bad. B-1, big arm autogenous pressure sensor is abnormal. B-2, the big arm downward pressure sensor is abnormal. B-3, the arm back pressure sensor is abnormal. B-4, arm extended pressure sensor anomaly. B-5, the bucket back pressure sensor is abnormal. B-6, bucket extended pressure sensor anomaly. B-7, the pressure sensor is abnormal clockwise rotation. B-8, the counterclockwise turning the pressure sensor is abnormal. B-9, dextral pressure sensor anomaly. B-10, sinistral pressure sensor anomaly. B-11, P1 negative pressure sensor anomaly. B-12, P2 negative pressure sensor anomaly. B-15, back pressure sensor is abnormal. C-1, P1 pump pressure sensor is abnormal. C-2, P2 pump pressure sensor is abnormal. D-1, P1 neutral cut proportional valve abnormalities. D-2, P2 neutral cut proportional valve abnormalities. D-3, the proportion of straight travel valve abnormalities. D-6, the arm of variable renewable proportional valve abnormalities. E-1, P1 pump proportional valve abnormalities. E-2, P2 pump proportional valve abnormalities. F-1, booster valve abnormalities. F-2, the rotating brake solenoid is abnormal. F-3, the traveling speed changeover solenoid valve abnormalities. G-1, the stepper motor current exception. G-2, the stepper motor without a starting point indexing. G-3, an engine speed sensor is abnormal. H-1, throttle knob exception. Kobelco excavator SK200-8 display fault code (engine systems) sensor systems: P2228, the atmospheric pressure sensor fault (LO). P2229, the atmospheric pressure sensor fault (HI). P0192, rail pressure sensor fault (LO). P0193, rail pressure sensor fault (HI). P0191, rail pressure sensor failure. P0237, boost sensor fault (LO). P0108, boost sensor fault (HI). P0117, the water temperature sensor fault (LO). P0118, the water temperature sensor fault (HI). P0182, fuel temperature sensor fault (LO). P0183, fuel temperature sensor fault (HI). P0335, the main speed sensor system failure, the engine will not start / stop the engine. P0340, deputy speed sensor system failure, the engine will not start / stop the engine. P2120, dual throttle sensor system failures, speed down (idling speed 800r / min). P2121, a throttle sensor voltage is abnormal. P2122, a throttle sensor failure (LO). P2123, a throttle sensor failure (HI). P2126, throttle sensor 2 voltage is abnormal. P2127, throttle sensor 2 fault (LO). P2128, throttle sensor 2 fault (HI). Switches, relays, system fault codes: P0540, preheating device failure (open circuit / CND shorted). P0540, preheating device failure (+ B short circuit). P0617, the start switch circuit failure. P0686, the main relay circuit failure. Fuel pump system failure code: P0629, the fuel supply solenoid circuit fault (+ B short-circuit), the engine can not start / stop the engine. P0628, fuel pump solenoid circuit fault (full output mode), the output decline. P2635, history of abnormal pressure fuel pump. P2635, fuel pump solenoid valve stuck. P0088, rail pressure abnormalities, output declined. Fuel injection system fault codes: P1211, injector rail a solenoid valve drive system fault (GND short circuit), the output decline on / off cylinders (1, 4). P1214 Injector solenoid valve drive system common rail 2 fault (GND short circuit), the output decline on / off cylinder operation (two times, three times). P1212, injector rail a solenoid valve drive system failures (+ short-circuit B / open circuit), the output decline on / off cylinders (1, 4). P1215, injector solenoid valve drive system common rail 2 failures (+ short-circuit B / open circuit), the output decline on / off cylinder operation (two times, three times). P1601, multi-point fuel injector correction exceptions, output declined. P0201, injector solenoid valve circuit breaker, output drops on / off cylinder operation (1). P0202, solenoid injector 2 circuit breaker, output drops on / off cylinder operation (two times). P0203, solenoid injector 3 circuit breaker, output drops on / off cylinder operation (three times). P0204, solenoid injector 4 circuit breaker, output drops on / off cylinder operation (four times). P0263, cylinder correction fault 1. P0266, cylinder correction fault 2. P0269, cylinder correction failure 3. P0272, cylinder correction failure 4. EGR System: P0489, EGR valve is a linear solenoid valve malfunction (open circuit / GND short circuit), the output decline. P0490, EGR valve is a linear solenoid valve malfunction (VB short circuit), the output decline. P0404, EGR valve is stuck in an output drop. P0405, EGR valve is a safety sensor fault (LO). P0406, a safety sensor valve failure (HI). Turbine system fault code: P0234, turbo too large, the output decreases. Engine system (state judge) fault code: P0217, overheating, output declined. P0219, the engine coaster. Communication: U1001, CAN communication interruption (vehicle). ECU system: P0611, ECU poor charging circuit (LO), the output decline. P0200, ECU poor charging circuit (HI). P0605, ROM exception. P0606, CPU failure, the engine will not start the engine stopped. P0607, CPU monitoring IC exceptions, output declined. Kobelco excavator SK330-6E fault code (sequential) and the reasons are considered Code Troubleshooting The reason is considered 07 Engine overtravel (red light) E / G input speed sensor or timing sensor becomes the equivalent of a pulse above 2400rpm ◆ connector inside the water ◆ speed sensor, timing sensor installation lax ◆ wiring is bad ◆ rotary gear adhesion of a foreign body ◆ speed sensor or timing sensor failure ◆ electronic speed controller failure 11 Governor port (red light) Instruction electronic regulator controller and rack position is inconsistent ◆ rack sensor using VC 5V power supply lines, poor ground ◆ Wiring PWM signal (rack position) signal abnormalities ◆ wiring BUF VIS (rack sensor) signal abnormality ◆ electronic speed controller for abnormal born PWM signal (control rack position) abnormalities ◆ Failure to adjust the internal servo motor drive circuit, etc. 14 + 15 Two speed sensor (red light) The number of input pulses and the timing sensor speed sensor inconsistencies ◆ Speed sensor or timing sensor wiring anomaly ◆ Installation unusual speed sensor or timing sensor ◆ connector inside the water ◆ rotary gear adhesion of a foreign body ◆ electronic speed controller failure ◆ speed sensor or timing sensor failure 16 Throttle sensor 2 (no lights) From the controller to the output voltage is below 0.2V or 4.8V above ◆ electromechanical controller exception ◆ Record abnormal 17 Electronic timer control (orange lights) Rack rack position specified value and the actual measured signal is inconsistent ◆ exception code 22 also appear to confirm the rack sensor anomaly ◆ exception code 22 is not the same when ◆ PWM (control rack position) command line anomalies ◆ rack abnormal sensor output voltage VIST ◆ internal rack does not work properly according to instructions 19 Atmospheric sensors ◆ mechanical condition: flat no problem, there is a problem referred Heights jobs Twenty one Water temperature sensor ◆ mechanical condition: starting the engine at low temperature properties deteriorate Twenty two Rack sensor (red light) Rack sensor output voltage is below 0.5V or 4V above ◆ rack sensor using VC 5V power supply lines, poor ground ◆ governor side of the rack sensor anomaly ◆ Wiring BUF VIST (rack sensor) line anomalies Twenty three Timer control valve (orange light) suction hose system abnormalities 33 System error (red light) System error ◆ electronic speed controller exception Power ◆ electronic speed controller.Wiring broken or shorted measured out ◆ TCV ADV. throttle potentiometer output voltage of 0.8V above ◆ electromechanical controller exception ◆ wiring anomaly 16 + 24 1. GCV RTD (injection timing control valve) wiring anomaly Twenty four Throttle sensor 1 (no lights) From the controller to the output voltage is below 0.2 while the throttle sensor fault (orange light) from the controller. the actual E / G rotation speed is very low ◆ Engine emergency stop cables are hanging ◆ pump torque becomes too large ◆ poor engine output . the bad ground 34 Q adjusting resistor (lamp lights) ◆ mechanical condition: engine output to minimum resize Forty five Boost sensor (orange light) In addition to the starter motor being started outside.8V less than ◆ electromechanical controller exception ◆ wiring anomaly 32 Boost sensor (orange light) From booster sensor output voltage is below 0.5V or 4.2V or 4.2V or 4.8V above ◆ electronic speed controller exception ◆ to boost sensor wiring anomaly ◆ boost sensor malfunction ◆ air filter. — arm extended pressure sensor anomaly. B-2. — P1 neutral cut proportional valve abnormalities. B-15. — throttle knob exception. — counterclockwise turning the pressure sensor is abnormal. D-2. — bucket extended pressure sensor anomaly. — stepper motor current exception. – P2 negative pressure sensor anomaly. — of the engine speed sensor is abnormal. — clockwise rotation pressure sensor is abnormal. H-1. — forearm variable renewable proportional valve abnormalities. — stepper motors without a starting point indexing. B-11. B-10. B-6. — dextral pressure sensor anomaly. – back pressure sensor is abnormal. B-3. — electromechanical controller communicates with unusual instrumentation. D-3. – P1 negative pressure sensor anomaly. . — P2 pump proportioning valve abnormalities. — booster valve abnormalities. 1-1. A-2. — P2 neutral cut proportional valve abnormalities. B-1. 1-2. F-1. — of the rotating brake solenoid is abnormal. F-2. — bucket retraction pressure sensor is abnormal. B-9. A-1. D-1. — traveling speed changeover solenoid valve abnormalities. E-1. B-12. F-3. C-2. B-4. — Electrical A bad adjustment. — P2 pump pressure sensor is abnormal. — battery relay exception. G-1. B-5. B-8. E-2. — P1 pump proportional valve abnormalities. — not electromechanical A adjusted. B-7. G-3. – sinistral pressure sensor anomaly. — P1 pump pressure sensor is abnormal. — arm downward pressure sensor is abnormal.65 Throttle SW (no lights) ◆ mechanical condition: changes to the usual control mode 78 Heater relay (orange light) ◆ to bad wiring heating relay Kobelco excavator @ // SK200-6 fault code Description Fault code Fault grounds 1 —– electromechanical controller failure. — big arm raw pressure sensor anomaly. — arm retraction pressure sensor is abnormal. D-6. G-2. — walking straight proportional valve abnormalities. C-1. P2120. P0191. speed down (idling speed 800r / min). P2128. — atmospheric pressure sensor fault (HI). P0237. — fuel temperature sensor fault (LO). P0118. — rail pressure sensor fault (HI). — atmospheric pressure sensor fault (LO).Kobelco SK series digging machine / sensor system / fault code Description Fault code Fault grounds P2228. — throttle sensor 2 voltage is abnormal. P2122. P0192. SK140LC-8 10802 alarm is the intake pressure sensor connected to the line between ECU failures caused by poor 00198 is the engine hydraulic switch disconnection alarm G033 engine speed sensor circuit anomalies SK200-8 . the engine will not start / stop. the engine will not start / stop. P2123. P0108. P2126. — a throttle sensor failure (HI). — throttle sensor 2 fault (HI). P0335. P0182. P0117. — dual throttle sensor system failures. — temperature sensor fault (HI). — the main speed sensor system failure. P2121. — boost sensor fault (HI). P0340. P2229. — throttle sensor 2 fault (LO). — a throttle sensor failure (LO). P0183. P0193. — fuel temperature sensor fault (HI). — temperature sensor fault (LO). — rail pressure sensor failure. — a throttle sensor voltage is abnormal. SK200-8 P1211 alarm is grounding alarm basin oil line P0340 alarm is deputy speed sensor failure alarm Z010 diesel common rail pressure alarm is low or the oil injector wear serious SK130-8 00198 is the lack of oil pressure alarm 01008 alarm engine hydraulic switch disconnection alarm SK75-8 G013 alarm refers to the engine throttle motor abnormalities progress H013 alarm throttle line is bad SK130-8 B173 alarm is connected to the low pressure sensor attachments appear disconnected the electrical circuit fault. — Vice speed sensor system failure. — boost sensor fault (LO). — rail pressure sensor fault (LO). P2127. the start switch circuit failure. fuel pump solenoid valve stuck. throttle sensor 2 fault (LO). output declined. the fuel supply solenoid circuit fault (+ B short-circuit). the output decline. relays system: fault codes. P2123. P0182. the main relay circuit failure. throttle sensor 2 fault (HI). P0237.P1092 is a common-rail diesel injection device alarm pressure sensor failure. P0340. speed down (idling speed 800r / min). SK260-8 P0088 rail pressure abnormal alarm P0404 alarm solenoid valve 4-cylinder engine failure alarm Kobelco SK200-8 fault code (engine systems) sensor systems: P2228. P0183. P0118. P0191. P2121. P2120. preheating device failure (+ B short circuit). P0193. P0335. P2126. P0088. P0108. fuel pump solenoid circuit fault (full output mode). boost sensor fault (LO). P0117. deputy speed sensor system failure. fuel temperature sensor fault (LO). Switches. a throttle sensor failure (HI). P0540. P0628. throttle sensor 2 voltage is abnormal. the water temperature sensor fault (HI). P0540. rail pressure sensor fault (HI). the engine will not start / stop the engine. the atmospheric pressure sensor fault (LO). P2122. history of abnormal pressure fuel pump. boost sensor fault (HI). rail pressure abnormalities. the engine will not start / stop the engine. P2128. preheating device failure (open circuit / CND shorted). a throttle sensor voltage is abnormal. P2635. the main speed sensor system failure. P2127. the water temperature sensor fault (LO). rail pressure sensor failure. rail pressure sensor fault (LO). P0617. P2229. P0192. the engine can not start / stop the engine. a throttle sensor failure (LO). P0336 is the primary speed sensor alarm alarm P0405 EGR valve is rising alarm sensor alarm SK210-8 P0617 is a start switch malfunction alarm P0404 EGR issuing warning alarm is P2635 alarm diesel common rail high-pressure pump end solenoid valve failure P0405 EGR valve security sensor alarm is not working SK250-8 P0203 is a 3-cylinder injector alarm break alarm 10802 alarm is the engine speed sensor voltage is abnormal. Fuel pump system: P0629. P0686. P2635. fuel temperature sensor fault (HI). the atmospheric pressure sensor fault (HI). dual throttle sensor system failures. Fuel injection system: . P0606. injector rail a solenoid valve drive system fault (GND short circuit). CPU failure. ROM exception. P0117. P1212. P0404. rail pressure sensor fault (LO). P0405. Turbine system: P0234. the engine will not start the engine stopped. P0605. rail pressure sensor fault (HI). Engine system (state judge): P0217. the water temperature sensor fault (HI). P0204. the atmospheric pressure sensor fault (LO). P0118. P0108. overheating. the output decreases. ECU poor charging circuit (LO). P0269. output declined. P1215.P1211. output drops on / off cylinder operation (two times). P0272. P0202. EGR valve is a linear solenoid valve malfunction (VB short circuit). three times). P1214 Injector solenoid valve drive system common rail 2 fault (GND short circuit). injector solenoid valve drive system common rail 2 failures (+ short-circuit B / open circuit). output declined. 4). the code following meanings: A Kobelco SK-8 (engine systems) sensor systems: P2228. 4). the output decline. Communication: U1001. solenoid injector 2 circuit breaker. the output decline. P0200. the output decline. P0191. a safety sensor valve failure (HI). turbo too large. injector rail a solenoid valve drive system failures (+ short-circuit B / open circuit). output drops on / off cylinder operation (three times). EGR valve is stuck in an output drop. P0203. output drops on / off cylinder operation (1). P0266. cylinder correction fault 1. P0192. P0607. solenoid injector 3 circuit breaker. output drops on / off cylinder operation (four times). multi-point fuel injector correction exceptions. CAN communication interruption (vehicle). EGR valve is a safety sensor fault (LO). P0237. P0201. CPU monitoring IC exceptions. solenoid injector 4 circuit breaker. Kobelco SK-8] [fault code. output declined. the atmospheric pressure sensor fault (HI). boost sensor fault (HI). P0406. the engine coaster. P0193. cylinder correction failure 4. the output decline on / off cylinders (1. cylinder correction failure 3. P2229. cylinder correction fault 2. . three times). EGR valve is a linear solenoid valve malfunction (open circuit / GND short circuit). rail pressure sensor failure. P1601. P0219. EGR System: P0489. the output decline on / off cylinder operation (two times. injector solenoid valve circuit breaker. P0263. boost sensor fault (LO). the water temperature sensor fault (LO). the output decline on / off cylinders (1. P0490. ECU system: P0611. ECU poor charging circuit (HI). the output decline on / off cylinder operation (two times. the main fuel pump relay circuit fault system: P0629. P1214. P0617. a throttle sensor voltage is abnormal. output declined. P0628. . preheating device failure (+ B short circuit). the main speed sensor system failure. 4 Kobelco SK-8EGR system: P0489. P1212. the engine will not start / stop the engine. output drops on / off cylinder operation (two times). throttle sensor 2 fault (LO). P2120. 2 Kobelco SK-8 switches. EGR valve is a linear solenoid valve malfunction (VB short circuit).P0182. throttle sensor 2 fault (HI). . P0204. cylinder correction fault 2. P0272. 3 Kobelco SK-8 fuel injection system: P1211. P2635. cylinder correction failure 3. a throttle sensor failure (LO). P0540. the output decline on / off cylinder operation (two times. the start switch circuit failure. cylinder correction fault 1. fuel temperature sensor fault (HI). P0335. P0266. the fuel supply solenoid circuit fault (+ B short-circuit). the output decline on / off cylinders (1. speed down (idling speed 800r / min). cylinder correction failure 4. solenoid injector 3 circuit breaker. three times). dual throttle sensor system failures. P2121. P0686. injector rail a solenoid valve drive system failures (+ short-circuit B / open circuit). three times). fuel pump solenoid valve stuck. P0202. 4). a throttle sensor failure (HI). P0404. output declined. P2123. P0201. the engine will not start / stop the engine. the output decline on / off cylinders (1. P2122. EGR valve is stuck in an output drop. P0203. P2126. deputy speed sensor system failure. solenoid injector 2 circuit breaker. injector solenoid valve drive system common rail 2 fault (GND short circuit). injector solenoid valve circuit breaker. the output decline. P1601. the engine can not start / stop the engine. preheating device failure (open circuit / CND shorted). P1215. P0340. fuel pump solenoid circuit fault (full output mode). injector solenoid valve drive system common rail 2 failures (+ short-circuit B / open circuit). the output decline. multi-point fuel injector correction exceptions. P0269. injector rail a solenoid valve drive system fault (GND short circuit). solenoid injector 4 circuit breaker. 4). P2127. P2128. rail pressure abnormalities. EGR valve is a linear solenoid valve malfunction (open circuit / GND short circuit). P2635. throttle sensor 2 voltage is abnormal. fuel temperature sensor fault (LO). the output decline. history of abnormal pressure fuel pump. output drops on / off cylinder operation (four times). P0263. output drops on / off cylinder operation (1). relays system: P0540. output drops on / off cylinder operation (three times). the output decline on / off cylinder operation (two times. P0490. P0088. P0183. overheating. P0200. P0406. 2014 | Repair Manual How to Hitachi 200-3 240-3270-3 fault code: 11100-2 abnormal engine speed 11101-3 engine speed control knob sensor high pressure anomaly 11101-4 Low engine speed control knob sensor anomaly 11200-3 pump an oil pressure sensor high pressure anomaly 11200-4 pump an oil pressure sensor low pressure anomaly 11202-3 high pressure pump 2 oil pressure sensor anomaly 11202-4 pump 2 Low oil pressure sensor is abnormal 11206-3 pump an abnormal high pressure pump control pressure sensor 11206-4 pump a high-pressure pump control abnormal low pressure sensor 11208-3 pump two high-pressure pump control pressure sensor anomaly 11208-4 pump two high-pressure pump control abnormal low pressure sensor 11301-3 swing pilot pressure sensor high pressure anomaly 11301-4 swing pilot pressure sensor low pressure anomaly 11302-3 Boom pilot pressure sensor high pressure anomaly 11302-4 Boom pilot pressure sensor low pressure anomaly 11303-3 Stick to recover the pilot pressure sensor high pressure anomaly 11303-4 Stick to recover the pilot pressure sensor low pressure anomaly 11304-3 walking pilot pressure sensor high pressure anomaly .P0606. the engine will not start the engine stopped. CPU monitoring IC exceptions. the output decline. EGR valve is a safety sensor fault (LO). P0607. output declined. CAN communication interruption (vehicle). 5 Kobelco SK-8 turbo system: P0234. ECU poor charging circuit (HI). output declined. turbo too large. 6 Kobelco SK-8 engine system (state judge): P0217. 7 Kobelco SK-8 Communication: U1001.P0405. P0219. the output decreases. a safety sensor valve failure (HI). ROM abnormal . [Troubleshooting] Hitachi excavator fault code fault code Sep 7. P0605. CPU failure. the engine coaster. ECU poor charging circuit (LO). 8 Kobelco SK-8ECU system: P0611. 636-2 camshaft angle sensor abnormality (abnormal signal) does not match the cam signal pulses.11304-4 walking pilot pressure sensor low pressure anomaly 11307-3 front attachment pilot pressure sensor high pressure anomaly 11307-4 front attachment pilot pressure sensor low pressure anomaly 11400-2 pump 2 maximum flow limit control solenoid valve current feedback abnormal 11400-3 pump 2 maximum flow limit high-current feedback control solenoid valve abnormalities 11400-4 pump 2 maximum flow limit low-current feedback control solenoid valve abnormalities 11401-2 torque current feedback control solenoid valve abnormalities 11401-3 torque feedback control solenoid valve high current abnormal 11401-4 torque low current feedback control solenoid valve abnormalities 11402-2 solenoid valve unit (SF) (tap renewable) Current Feedback abnormal 11402-3 solenoid valve unit (SF) (mining regeneration) high current abnormal feedback 11402-4 solenoid valve unit (SF) (tap renewable) feedback low current abnormal 11403-2 solenoid valve unit (SC) (Stick Regeneration) Current Feedback abnormal 11403-3 solenoid valve unit (SC) (stick regeneration) high current abnormal feedback 11403-4 solenoid valve unit (SC) (Stick Regeneration) feedback low current abnormal 11404-2 solenoid valve unit (SG) (relief pressure control) Current Feedback abnormal 11404-3 solenoid valve unit (SG) (relief pressure control) high current abnormal feedback 11404-4 solenoid valve unit (SG) (relief pressure control) feedback low current abnormal 11405-2 solenoid valve unit (SI) (walking motor quick selection) Current Feedback abnormal 11405-3 solenoid valve unit (SI) (motor running quickly select) high current abnormal feedback 11405-4 solenoid valve unit (SI) (walking motor quick selection) feedback low current abnormal 11410-2 pump a maximum flow limit control solenoid valve (optional) Current Feedback abnormal 11410-3 pump a maximum flow limit control solenoid valve (optional) high current abnormal feedback 11410-4 pump a maximum flow limit control solenoid valve (optional) feedback low current abnormal 11910-2 ECM received from the actual engine speed 11918-2 received from the monitor mode to 11911-2 safety from the ECM receives a signal 11920-2 from the ECM receives fuel flow 11914-2 ECM received from the radiator coolant temperature 11901-3 high-pressure hydraulic oil temperature sensor 11901-4 low pressure hydraulic oil temperature sensor 11905-3 boom bottom pressure sensor high pressure (optional) abnormalities 11905-4 boom bottom pressure sensor low voltage (optional) abnormalities ECM Sensor System Malfunction Code Cause 636-2 camshaft angle sensor error (no signal) despite crank signal. but the signal does not appear cam. . Can not be restarted after shutdown ○○ .9 V 102-3 pressurized intake air pressure sensor anomaly (low pressure anomaly) pressurized intake air pressure sensor voltage is less than 0.85 V 100-3 oil pressure sensor abnormality (low pressure anomaly) oil pressure sensor voltage is less than 0.1 V 636-2 camshaft angle sensor error (no signal) ○ ○ 636-2 camshaft angle sensor abnormality (abnormal signal) When the operation is not affected. 636-7 camshaft phase mismatch of the crank angle sensor gap at the right cam pulse does not exist.1 V 105-3 supercharged intake air temperature sensor is abnormal (abnormal high pressure) within five minutes or more after starting the engine coolant temperature or time exceeds 50 ° C (122 ° F). cam signal does not appear.5 V 157-3 rail pressure sensor anomaly (low pressure anomaly) rail pressure sensor voltage is less than 0. 723-2 crank speed sensor abnormality (abnormal signal) does not match the cam signal pulses.1 V 157-3 rail pressure sensor anomaly (high pressure anomaly) rail pressure sensor voltage greater than 4. 172-3 intake air temperature sensor is abnormal (high error) after starting the engine intake air temperature sensor within 3 minutes a voltage higher than 4.85 V 110-4 coolant temperature sensor abnormality (low pressure anomaly) coolant temperature sensor voltage is less than 0.7 V 100-4 oil pressure sensor abnormality (abnormal high pressure) oil pressure sensor voltage higher than 4.95 V 172-4 intake air temperature sensor is abnormal (low pressure anomaly) intake air temperature sensor voltage is less than 0.1 V 10001-3 EGR abnormal position (brushless specification) EGR position output signal conditions can not appear 108-4 atmospheric pressure sensor abnormality (abnormal high pressure) is higher than the atmospheric pressure sensor voltage 3.85 V 174-4 fuel temperature sensor abnormality (low pressure anomaly) fuel temperature sensor voltage is less than 0.5 V 174-3 fuel temperature sensor anomaly (high pressure anomalies) within 3 minutes after starting the engine fuel temperature sensor voltage higher than 4.1 V 102-4 pressurized intake air pressure sensor anomaly (high pressure anomaly) pressurized intake air pressure sensor voltage greater than 4.95V 105-4 pressurized intake air temperature sensor is abnormal (low pressure anomaly) pressurized intake air temperature sensor voltage is less than 0.723-2 crank speed sensor abnormality (no signal) despite crank signal. the pressurized intake air temperature sensor voltage higher than 4.1 V 110-3 coolant temperature sensor abnormality (abnormal high pressure) coolant temperature sensor voltage higher than 4.8 V 108-3 atmospheric pressure sensor anomaly (low pressure anomaly) atmospheric pressure sensor voltage is less than 0. 723-2 crank speed sensor abnormality (no signal) ○ 723-2 crank speed sensor abnormality (abnormal signal) Output power does not drop ○ 636-7 camshaft angle sensor is not affected when the phase mismatch action. + B or shorted to ground Suction control valve drive current is higher than 2400 mA or less than 50 mA. Or target current and the actual current difference of 1000 mA or more 651-3 nozzle # 1 Open injector drive system without a monitor input signal 652-3 nozzle # 2 drive system open injector 2 no input signal monitor 653-3 nozzle # 3 drive system open injector 3 no input signal monitor . After the shutdown can not be restarted ○ ○ 172-3 intake air temperature sensor is abnormal (high pressure anomaly) ○ 172-4 intake air temperature sensor is abnormal (low pressure anomaly) Output power does not drop ○ 110-3 coolant temperature sensor is abnormal (high pressure anomaly) ○ 110-4 coolant temperature sensor abnormality (low pressure anomaly) Output power does not drop ○ 102-4 pressurized intake air pressure sensor anomaly (high pressure anomaly) ○ 102-3 pressurized intake air pressure sensor anomaly (low pressure anomaly) Output power does not drop ○ 10001-3 EGR abnormal position (brushless specification) output power does not drop ○ 108-4 atmospheric pressure sensor abnormality (abnormal high pressure) ○ 108-3 atmospheric pressure sensor anomaly (low pressure anomaly) Output power does not drop ○ 174-3 fuel temperature sensor abnormality (abnormal high pressure) ○ 174-4 fuel temperature sensor abnormality (low pressure anomaly) Output power does not drop ○ 157-3 rail pressure sensor anomaly (high pressure anomaly) ○ 157-4 rail pressure sensor anomaly (low pressure anomaly) Output power reduction: 70% ○ 100-4 oil pressure sensor abnormality (abnormal high pressure) ○ 100-3 oil pressure sensor abnormality (low pressure anomaly) 105-3 pressurized intake air temperature sensor is abnormal (high pressure anomaly) ○ 105-4 pressurized intake air temperature sensor is abnormal (low pressure anomaly) 10002-2 EGR valve control abnormal valve target position and the actual upgrade to enhance the position difference exceeds 20% 1347-0 Suction control valve drive system open. 5820 psi) 633-7 pressure limiter opening pressure limiter Open 1240-1 no pressure feed to the pump (fuel leakage) the control valve when the suction power is 33% or less. rotary continuous ringing alarm Notes: (1) Check the wiring harness (2) replace the rotary pilot pressure sensor 3.75V or more Affected control: (1) HP mode control (2 stick regeneration control (3) excavator regeneration control (4) Automatic power boost control (5) Accessories Flow Control Failure occurs when the machine is working symptoms: (1) HP control when the boom lifting speed without lifting (2) recovery and boom arm combination to enhance the operating arm slow Notes: (1) Check the wiring harness (2) replace Boom pilot pressure sensor . fault code: 11301-3 Problem: Boom pilot pressure sensor high pressure anomaly Cause: Voltage 4.75V or more Affected control: (1) stick regeneration control (2) Attachment Flow Control (3) rotation alarm control Failure occurs when the machine is working symptoms: (1) a combination of arm swing back and stick-in operation is slow (2) If the machine is equipped with a rotary alarm and when the alarm works when the rotary. or when the control valve is delivered to the suction pressure of 28000 mm3 / sec or more and 1200 min 1-speed. 7270 psi) 1239-1 no pressure feed to the pump (fuel leakage) when the pressure supplied to the control valve so that the suction is 900 min 1-speed. 2180 psi) or less A fault code: 11301-3 Problem: Rotary pilot pressure sensor high pressure anomaly Cause: Voltage 4. fault code: 11301-4 Problem: Rotary pilot pressure sensor low pressure anomaly Cause: The voltage of less than 0. rotary continuous ringing alarm Notes: (1) Check the wiring harness (2) replace the rotary pilot pressure sensor 2.” and shared the tank pressure exceeds 190 MPa 157-2 common sump abnormal pressure (pump overpressure) when the suction control valve is a power of 40% or more.25V Affected control: (1) stick regeneration control (2) Attachment Flow Control (3) rotation alarm control Failure occurs when the machine is working symptoms: (1) a combination of arm swing back and stick-in operation is slow (2) If the machine is equipped with a rotary alarm and when the alarm works when the rotary. the actual pressure of the tank is 15 MPa (150 kg / cm2. or when the target pressure of the suction control valve 90 mm3 / sec or less. the actual the tank pressure is higher than the target pressure of the tank 50 MPa (510 kg / cm2.654-3 nozzle # 4 drives open injector 4 is no input signal monitor 655-3 nozzle # 5 drive system open injector 5 is no input signal monitor 656-3 nozzle # 6 drive system open injector 6 is no input signal monitor 157-0 common sump pressure anomaly (a) share the tank pressure exceeds 185 MPa 157-0 common sump pressure anomalies (two) a “shared sump pressure abnormal. the actual pressure is higher than the target oil tank sump pressure 40MPa (410 kg / cm2. Line receiving the injectors. ② Cause a · 2 cylinder injector solenoid wire circuit. fault code can be viewed on the display module or ET.3 electromagnetic coil inside the cylinder injector open circuit. short circuit. diesel power is low. ③ system response ECM will record fault code. fault code 0001-11 ① Main Symptom a · individual cylinder diesel engine does not fire. b. fault code: 11301-4 Problem: Boom pilot pressure sensor low pressure anomaly Cause: The voltage is lower than 0.2 electromagnetic coil inside the cylinder injector open circuit.25V Affected control: (1) HP mode control (2 stick regeneration control (3) excavator regeneration control (4) Automatic power boost control (5) Accessories Flow Control Failure occurs when the machine is working symptoms: (1) HP control when the boom lifting speed without lifting (2) recovery and boom arm combination to enhance the operating arm slow Notes: (1) Check the wiring harness (2) replace Boom pilot pressure sensor [Hitachi excavator ZX240-3 several common fault code details] (1) Excavators one cylinder injector fault. can be viewed on the display module or ET fault code. (3) fault code 0003-11: three-cylinder injector fault ① Main Symptom a. ② Cause a. Reason if the generated code is a common fault short circuit or open circuit. ③ system response ECM will record fault code. individual cylinder diesel engine does not fire. ③ system response ECM will record fault code. b. ② Cause a. short-circuit. diesel power is low. b. short-circuit. short-circuit. then there are two cylinders will be affected. b. diesel power is low.1 cylinder injector solenoid wire circuit. (2) fault code 0002-11: two cylinder injector fault ① Main Symptom a. short circuit. individual cylinder diesel engine does not fire. fault code can be viewed on the display module or ET. b.1 electromagnetic coil inside the cylinder injector open circuit. Reason if the generated code is a common fault short circuit or open circuit. Reason if the generated code is a common fault short circuit or open circuit. then there are two cylinders will be affected. since they use the same wires to injector on.3 cylinder injector solenoid wire circuit. b. since they use the same wires to injector on (4) fault code 0004-11: four-cylinder injector fault . since they use the same guide. short circuit.4. then there are two cylinders will be affected. fault code can be viewed on the display module or ET. ② Cause a. ② cause of the malfunction is detected ECM ECM or ECM charging more than Is readout signal voltage higher than 8. b. short circuit. it will have a significant impact on diesel engines.5 cylinder injector solenoid wire circuit. short circuit. ② Cause a · 4-cylinder injector solenoid coil wire open circuit. then there are two cylinders will be affected. individual cylinder diesel engine does not fire. short circuit. ③ system response ECM will record the fault code. then there are two cylinders will be affected.ECM ET all digital sensor data is marked as invalid data. short circuit. b. ③ system response ECM will record fault code. fault code can be viewed on the display module or ET. individual cylinder diesel engine does not fire. short-circuit. since they use the same wires to injector on. and all the digital sensor data are set to default values.45V sustained Is. (5) fault code 0005-11: five-cylinder injector fault ① Main Symptom a.4 electromagnetic coil inside the cylinder injector open circuit. diesel power is low. Reason if the generated code is a common fault short circuit or open circuit. fault code can be viewed on the display module or . short-circuit. (7) fault code 0041-03: 8V DC power supply and battery positive short-circuit ① Main Symptom If the voltage is significantly lower than 8V. then there are two cylinders will be affected. diesel power is low.6 cylinder injector solenoid wire circuit. ③ system response ECM will record fault code. diesel engines will be limited to low idle state. (6) fault code 0006-11: 6-cylinder injector fault ① Main Symptom a. fault code can be viewed on the display module or ET. Reason if the generated code is a common fault short circuit or open circuit. . since they use the same wires to injector on. b. ③ system response ECM will record fault code.6 electromagnetic coil inside the cylinder injector open circuit. (8) fault code 0041-04: 8V DC power supply and ground short ① Main Symptom If the voltage is significantly lower than 8V.① Main Symptom a · individual cylinder diesel engine does not fire. since they use the same wires to injector on. diesel power is low. b. Reason if the generated code is a common fault short circuit or open circuit. it will have a significant impact on diesel engines. b.5 electromagnetic coil inside the cylinder injector open circuit. b. ② Cause a. diesel engines will be limited to low idle state. fault code can be viewed on the display module or . b. excavators can not properly work 19 PVC failure excavator.25V Hitachi excavator fault generation 31 R sensor and harness bad contact. -3 Series – Maintenance fault code analysis Excavator fault code fault code analysis. bad contact Hitachi excavator excavator N sensor fault on behalf of the 13 abnormal sensor harness connection between N and EC bad 17 Hitachi excavators PVC failure.75 volts Failure on behalf of the 34 Hitachi excavator excavator arm to enhance pilot pressure sensors.② cause of the malfunction is detected ECM ECM or ECM charging more than Is readout signal voltage higher than 8. sensor input signal falls below 0. Hitachi excavator engine and machine function failure. Hitachi excavator -2.ECM ET all digital sensor data is marked as invalid data.45V sustained Is. the input signal from the sensor is lower than 0.75 Hitachi excavator Hitachi excavator arm fault code 36 low voltage sensor input signal is too small.25V 29A sensor fault code and harness shorted. not a job 22 HITACHI oil pump control is not normal Fault code 25 excavators DP sensor and wiring harness is not connected.75V 30 Hitachi excavator A bad sensor and wiring harness connector.75V 32 T Hitachi excavator bad sensor or wiring harness connector. Hitachi excavator sensor input voltage is higher than 4. excavators can not work Hitachi excavator Hitachi excavator fault on behalf of 21 PVC failure. diesel low power operation. fault phenomenon 09EC Hitachi excavator sensor failure or sensor harness shorted 10EC sensor harness connection is bad. excavator engine does not work Fault code 18PVC failure. T sensor input signal is greater than 4. poor contact 26 Hitachi excavators DP sensor and wiring harness shorted Hitachi excavator P sensor fault on behalf of the 27 excavators and harness shorted 28P Hitachi excavator sensor and harness bad contact.25V Fault code 33 excavator arm to enhance pilot pressure sensor or wire shorted. ② Cause ECM detects all of the following conditions: . and all the digital sensor data are set to default values. diesel engine idling bad. sensor wire is disconnected 35 excavator arm low voltage sensor input signal is greater than 4. sensor input signal falls below 0. excavators input signal is greater than 4. ③ system response ECM will record the fault code. or forearm low pressure sensor wire is disconnected Hitachi (HLTACHL) explain in detail excavator fault code troubleshooting steps: 1 fault code 0164-04: injection-driven pressure sensor and ground short ① Main Symptom a. and the use of 17. d has at least a power supply to the ECM 2s.. diesel engine stops running. below the normal operating temperature of the diesel engine is easy to start. diesel engine can not be started. Under normal operating temperature of the diesel engine difficult to start. fault code can be viewed on the display module or ET. 4 fault code 0172-03: intake air temperature sensor and battery positive open / short ① Main Symptom diesel low power operation. b. 2 fault code 0164-11: injector actuation pressure sensor mechanical failure ① Main Symptom a.6s. the battery voltage is three times lower in the last 7s. a difference between the actual injection pressure and injection required to drive the driving pressure exceeds 3MPa.ECM will drive pressure control the valve current is set to a fixed value. ③ system response ECM will record fault code. ③ system response ECM will record fault code. e. Only when the diesel engine ECM will record operating code. d. b. fault code can be viewed on the display module or ET. can be viewed on the display module or ET fault code . leading to the fuel injection pressure control valve drive maximum or minimum output current for longer than the time required This fault code indicates that there is a mechanical fault. ② Cause ECM detects any of the following situations: .5MPa pressure injection as the default . a fuel injector drive signal voltage is lower than 0. then the injector drive system may exist air start the engine for several minutes under 1500r / min speed.ECM read signal voltage above 4. . less than 9V. c. to exclude residual air. b. cooling mode does not currently exist.5V sensor battery positive supply line and short-circuit fault code does not currently exist .1V pressure sensor at least 0.06s. ② Cause ECM detects all of the following conditions: a. If the system recently repaired. a diesel engine can not be started. ④ Troubleshooting perhaps only at operating temperatures have failed. diesel engine does not fire. b. rebounded after 0. b.5V sensor battery positive supply line and short-circuit fault code does not currently exist 0262-03. b. ECM and the electronic control system is operating normally. ② Cause ECM detects one of the following situations: .ECM the injector driving pressure marked as invalid data. the battery voltage drops below 9V. ③ system response ECM will record fault code. c.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. 3 fault code 0168-02: System voltage ripple ① Main Symptom a.92V at least 8s. diesel engine idling bad. diesel low power operation. ③ system response ECM will record fault code. c. c.ECM oil temperature will be marked as invalid data.ECM intake air temperature will be marked as invalid data. 5 fault code 0172-04: intake air temperature sensor shorted to ground ① Main Symptom diesel low power operation. and the use of a temperature of 85 degrees as the default.0262-03. If the coolant temperature sensor is faulty.ECM intake air temperature will be marked as invalid data.92V at least 8s.2V signal voltage of at least 8s. [Troubleshooting] hyundai excavator fault code fault code . When b. b. the oil temperature is set to -10 degrees. one should use the following values: . d.5V sensor battery positive supply line and short-circuit fault code does not currently exist 0262-03. ③ system response ECM will record fault code. can be viewed on the display module or ET fault code . ② Cause ECM detects all of the following conditions: a.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04.ECM read signal voltage above 4. fault code can be viewed on the display module or ET . a diesel engine running.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. can be viewed on the display module or ET fault code .ECM read below 0. ③ system response ECM will record fault code. ② Cause ECM detects all of the following conditions: a. supply of power to at least the existing ECM 2s. b. 6 fault code 0175-03: oil temperature sensor and battery positive open / short ① The main symptom is no symptoms. d. and the use of a temperature of 85 degrees as the default. d. supply of power to at least the existing ECM 2s. c. diesel engine stops running. supply of power to at least the existing ECM 2s. and adjust the oil temperature values into the coolant temperature value.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04.5V sensor battery positive supply line and short-circuit fault code does not currently exist 0262-03. the oil temperature is set at 65 degrees. 2014 | Repair Manual How to hyundai-9 series excavators fault code: 101 3 hydraulic oil temperature sensor circuit – Voltage above normal or shorted high voltage 4 hydraulic oil temperature sensor circuit – Voltage below normal or shorted to low voltage 1050 working device (idling) higher than normal pressure sensor data A working device (idling) lower than normal pressure sensor data 2 working device (idle) pressure sensor data error 4 working device (idle) pressure sensor circuit – Voltage below normal or shorted to low voltage 1080 Walking (idling) higher than normal pressure sensor data A walk (idling) lower than normal pressure sensor data 2 Walking (idle) pressure sensor data error 4 Walking (idle) pressure sensor circuit – Voltage below normal or shorted to low voltage 1200 primary pump (P1 pump) pressure sensor data is higher than normal A main pump (P1 pump) pressure sensor data below normal Two main pump (P1 pump) pressure sensor data error 4 main pump (P1 pump) pressure sensor circuit – Voltage below normal or shorted to low voltage 1210 Main pump (P2 pump) pressure sensor data is higher than normal A main pump (P2 pump) pressure sensor data below normal Two main pump (P2 pump) pressure sensor data error 4 main pump (P2 pump) pressure sensor circuit – Voltage below normal or shorted to low voltage 1220 pressure sensor data overload higher than normal A pressure sensor data overload below normal 2 Overload pressure sensor data errors 4 overload pressure sensor circuit – Voltage below normal or shorted to low voltage 1230 a negative feedback pressure sensor data is higher than normal A pressure sensor is a negative feedback data below normal Two negative feedback pressure sensor 1 data errors 4 negative feedback pressure sensor 1 circuit – Voltage below normal or shorted to low voltage 1240 Negative feedback data is higher than normal pressure sensor 2 A negative feedback pressure sensor 2 data below normal Two negative feedback pressure sensor 2 data error 4 negative feedback pressure sensor 2 circuit – Voltage below normal or shorted to low voltage 1250 pilot pump (P3 pump) pressure sensor data is higher than normal A pilot pump (P3 pump) pressure sensor data below normal .Sep 7. ② Cause: ECM detects the throttle signal frequency is greater than or less than 150Hz 2000Hz time of 2s.ECM ET throttle position are marked as invalid data.ECM receive different engine speed signal from the alternate throttle switch. In one of the following occurs before the recent diesel engine speed to maintain the desired speed. fault code can be viewed on the display module or . and a bucket to close the pilot pressure sensor circuit – Voltage below normal or shorted to low voltage [TROUBLESHOOTING] DOOSAN EXCAVATOR FAULT CODE FAULT CODE Sep 7. .Two pilot pump (P3 pump) pressure sensor data error 4 pilot pump (P3 pump) pressure sensor circuit – Voltage below normal or shorted to low voltage 1270 boom pilot pressure sensor data to rise higher than normal A large increase in pilot pressure sensor data arm below normal 2 big boom pilot pressure sensor data errors rise 4 arm rose pilot pressure sensor circuit – Voltage below normal or shorted to low voltage 1330 arm to the inside / outside and bucket-crowd pilot pressure sensor data is higher than normal A forearm to the inside / outside and bucket-crowd pilot pressure sensor data below normal 2 arm to the inside / outside and bucket-crowd pilot pressure sensor data errors 4 arm to the inside / outside. a. ③ system response: ECM will record fault code. 2014 | Repair Manual How to Several common fault codes DOOSAN excavator Case This article from the SF excavator repair plant consolidation Share (1) Excavators fault code 0091-08: throttle position signal anomalies ① Main Symptom throttle switch must be used to set up an alternate engine speed. fault code can be viewed on the display module or ET .b. (2) Excavators fault code 0094-03: the fuel pressure sensor and battery positive open circuit. e · diesel engine is not running or running a diesel engine has been going on for at least 3min.ECM read signal voltage higher than 4. ② Cause: ECM detects all of the following conditions: a. signals from the entry into force of the throttle switch and hold it for 2s or more.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. e. b has at least the power supply of the ECM 2s. and the use of 600kPa pressure as the default.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. short circuit ① main diesel engine shutdown or failure phenomenon is not running. . d. c · 5V sensor supply line and battery positive short-circuit fault code does not currently exist 0262-03. . b has at least the power supply of the ECM 2s. d. . ③ system response ECM will record fault code. c · 5V sensor supply line and battery positive short-circuit fault code does not currently exist 0262-03. ② Cause ECM detects all of the following conditions: a · ECM reads the signal voltage higher than 4.8V continued 8s.8V continued 8s.ECM will Fuel pressure is marked as invalid data. diesel engine is not running or running a diesel engine has been going on for at least 3min. (3) fault code 0094-04: Fuel pressure sensor shorted to ground ① main diesel engine shutdown or failure phenomenon is not running. .ECM will Fuel pressure is marked as invalid data. e. d. diesel engine is not running.2V continued 18s. diesel low power operation. (4) fault code 0100-03: oil pressure sensor and battery positive open / short ① Main Symptom a. and the use of 600kPa pressure as the default. b.③ system response ECM will record fault code. c · 5V sensor supply line and battery positive short-circuit fault code does not currently exist 0262-03. ② Cause ECM detects all of the following conditions: a · ECM reads the signal voltage higher than 4.ECM read signal voltage higher than 0. .5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. ③ system response ECM will record fault code. b. b has at least the power supply of the ECM 2s. (5) fault code 0100-04: oil pressure sensor shorted to ground ① Main Symptom a. fault code can be viewed on the display module or ET . fault code can be viewed on the display module or ET .8V continued 8s. diesel low power operation. ② Cause ECM detects all of the following conditions: a. diesel engine speed is reduced. diesel engine speed is reduced.ECM will Oil pressure is marked as invalid data. and the use of 600kPa pressure as the default. . can be viewed on the display module or ET oil pressure fault code . c. diesel low power operation. diesel engine is not running. b. c.ECM will be marked as invalid data.ECM will Coolant temperature is marked as invalid data and the use temperature 90 ℃ as defaults.5V sensor power lines and ground short circuit fault code does not currently exist 0262-04. (7) fault code 0110-04: coolant temperature sensor shorted to ground ① Main Symptom a. diesel engine speed is reduced.92V or more 8s. ③ system response ECM will record fault code. ② Cause ECM detects all of the following conditions: a · ECM reads the signal voltage continues to 4. b. diesel engine does not fire. fault code can be viewed on the display module or ET .. (6) fault code 0110-03: coolant temperature sensor and battery positive open / short ① Main Symptom a. diesel engine does not fire. diesel will not go into cold mode. d. b has at least the power supply of the ECM 2s.5V sensor battery positive supply line and short-circuit fault code does not currently exist 0262-03. b. e. and the use of 600kPa pressure as the default. ③ system response ECM will record fault code. supply of power to at least the existing ECM 2s. d. diesel low power operation. supply of power to at least the existing ECM 2s. diesel engine speed is reduced. ③ system response BCM will record fault code. can be viewed on the display module or ET fault code . and the use of temperature 90 ℃ as the default value when the fault code for the current fault codes.2V signal voltage sustained 8s. b.ECM coolant temperature will be marked as invalid data.c. [Troubleshooting] Sumitomo excavator fault code fault code Sep 7. 2014 | Repair Manual How to Sumitomo series digging machine fault codes 7000 – P1 pressure sensor 7001 – P2 pressure sensor 7002 – N1 pressure sensor 7003N2– pressure sensor 7004– wear overload pressure sensor 7005– bottom pressure sensor wear 7006– rod pressure sensor 7020 — wear upper pressure sensor 7021 — rotary pressure sensor wear Walking through the pressure sensor 7022– 7023– wear arm pressure sensor 7040– fuel level sensor 7041 — oil temperature sensor 7045– monitor thermistor 7060 — boom angle sensor 7061– arm angle sensor 7062– deviation angle sensor 7063 — back to the oil filter blockage pressure switch 7200– swing brake solenoid valve . ② Cause ECM detects all of the following conditions: a · ECM read below 0. diesel does not go into cold mode. 7201– walking speed solenoid valve 7202 — boost solenoid valve 7203 — BZ walking alarm 7204– saving solenoid valve 7205 – REL charge pump stops 7206 — spare circuit return valve 7207– slewing brake release valve 7208 fan reverse solenoid valve 7209– air conditioning temperature signal output 7210 — Crane 7211– turning signals and bucket stop 7212– safety lock solenoid valve 7240 — pump output proportional valve 7241– pump flow proportional valve 7242 —.7406– Dorian backward pressure temperature 7420 — generator voltage 7421– level 7422– oil pressure 7423 — air filter 7424– back to the oil filter 7600 — CAN 7601– monitor communications 7602 — ECM communication 7603– Controller B Communications 7604– Controller S Communications 7605 — ECM 7606 — EEPROM 0087 — no pumping pressure 0088– rail pressure anomaly 0089– pumping high pressure 0090 — SCV drive system 0107 atmospheric pressure sensor (voltage at the end) 0108 atmospheric pressure sensor (high voltage) 0112 supercharged forward air temperature anomalies (voltage at the end) 0113 — booster forward air temperature anomalies (high voltage) 0117.Fan proportional valve 7243 — big arm proportional valve 7244 — arm proportional valve 7245– deviation proportional valve 7400.0183 — fuel temperature 0192– rail pressure (low voltage) 0193– rail pressure (high voltage) 0201 — 0206 glib driver circuit breaker (corresponding to each cylinder) .7402.0118 water temperature is too low or high 0182.7403– temperature 7404– oil 7405. 75 V Walking pressure sensor GND short / open 7022 ○ ignition switch is turned from no voltage ≦ 0.25 V 0.75 V Rotary Pressure Sensor GND short / open 7021 ○ ignition switch is turned from no voltage ≦ 0.25 V 0.25 V <voltage <4.75 V Pressure sensor GND link short / open 7006 ○ choose a crane voltage ≦ 0.25 V <voltage <4.75 V Pressure sensor P2 GND short / open 7001 ○ ignition switch is turned from no voltage ≦ 0.25 V <voltage <4.75 V Fuel oil level sensor open from 7040 ○ no resistance after the ignition is turned ≧ 100Ω 2 Ω <resistance <100 Ω .25 V 0.25 V <voltage <4.25 V <voltage <4.25 V 0.75 V Supply short-circuit voltage ≧ 4.75 V from the ignition switch is turned Supply short-circuit voltage ≧ 4.25 V 0.0336– crankshaft position sensor system 0340.25 V 0.25 V 0.75 V N1 pressure sensor GND short / open 7002 ○ ignition switch is turned from no voltage ≦ 0.25 V <voltage <4.75 V Supply short-circuit voltage ≧ 4.75 V Supply short-circuit voltage ≧ 4.75 V N2 pressure sensor GND short / open 7003 ○ from the ignition switch is turned on without voltage ≦ 0.25 V <voltage <4.25 V <voltage <4.75 V Supply short-circuit voltage ≧ 4.25 V <voltage <4.75 V from the ignition switch is turned Supply short-circuit voltage ≧ 4.75 V Bottom pressure sensor GND short / open 7005 ○ choose a crane voltage ≦ 0.25 V <voltage <4.75 V Supply short-circuit voltage ≧ 4.25 V 0.75 V Supply short-circuit voltage ≧ 4.75 V Supply short-circuit voltage ≧ 4.25 V <voltage <4.25 V 0.75 V The upper part of the body’s pressure sensor GND short / open 7020 ○ ignition switch is turned from no voltage ≦ 0.0341 — cam position sensor 0380– preheat sensor 0487 — EGR sensor Host fault code list (A) an electrical fault (input) [7000-7199] Fault location fault codes determine the timing of the failure mode occurred prerequisite judgment recovery judgment The conditions DTC display P1 pressure sensor GND short / open 7000 ○ ignition switch is turned from no voltage ≦ 0.0238– boost pressure sensor voltage low or high 0335.75 V Supply short-circuit voltage ≧ 4.75 V Overload pressure sensor GND short / open 7004 ○ Select the applicable regional EU voltage from the ignition switch is turned ≦ 0.25 V 0.25 V 0.75 V Arm off pressure sensor GND short / open 7023 ○ from the ignition switch no voltage ≦ 0.75 V Supply short-circuit voltage ≧ 4.0219– limit operation After 0237. 2 V <voltage <4.93 V) 111Ω <resistance <67200 Ω 0.8 V from the ignition switch is turned Short-circuit voltage ≧ 4. DTC recorded in the maintenance screen (DIAG) in. However. users no longer DTC screen display.8 V power supply Back to the oil filter clogging pressure switch open after 7063 ○ from the ignition switch is turned to the front of the engine start without pressure switch off pressure switch open Show “×” the project is not “abnormal electrical system” message.8 V from the ignition switch is turned Short-circuit voltage ≧ 4.2 V <voltage <4.5 V) Monitor thermistor (* 1) Open 7045 × no receipt from the ignition switch is turned fault bit is not received from the monitor from the monitor’s fault bit Short circuit Boom angle sensor GND short / open 7060 ○ choose a crane or anti-interference voltage ≦ 0.2 V 0.8 V power supply Deviation angle sensor GND short / open 7062 ○ choose a crane or anti-interference voltage ≦ 0.8 V from the ignition switch is turned Short-circuit voltage ≧ 4.5 V <voltage <4.2 V <voltage <4.8 V power supply Arm angle sensor GND short / open 7061 ○ choose a crane or anti-interference voltage ≦ 0. (2) electrical fault (output) [7200-7399] Fault location fault codes determine the timing of the failure mode occurred prerequisite judgment recovery judgment The conditions DTC display Rotary brake solenoid valve open from 7200 ○ no output after the ignition is turned ≠ Output Monitor Output = Output Monitor Short circuit Walking speed solenoid valve open from 7201 ○ no output after the ignition is turned ≠ Output Monitor Output = Output Monitor Short circuit 7202 ○ boost solenoid valve open after the ignition is turned from no output ≠ Output Monitor Output = Output Monitor Short circuit BZ walking alarm (* 1) Open 7203 × after turning the ignition switch from no output ≠ Output Monitor Output = Output Monitor Short circuit 7204 ○ saving solenoid valve open after the ignition is turned from no output ≠ Output Monitor Output = Output Monitor Short circuit REL Open 7205 ○ charge pump stops after the ignition is turned from no output ≠ Output Monitor Output = Output Monitor Short circuit Spare oil return circuit from the solenoid valve open 7206 ○ no output after the ignition is turned ≠ Output Monitor Output = Output Monitor Short circuit Swing open from the solenoid valve open 7207 ○ no output after the ignition is turned ≠ Output .2 V 0.93V) Short circuit from the ignition switch is turned resistance ≦ 111Ω (voltage ≦ 0.2 V 0. In addition.Short-circuit resistance ≦ 2 Ω Oil temperature sensor open 7041 ○ 3 minutes after the engine is started without resistance ≧ 67200Ω (voltage ≧ 4. In addition. (3) mechanical failure [7400-7599] Fault location fault codes determine the timing of the failure mode occurred prerequisite judgment recovery judgment The conditions DTC display Abnormally high temperature 1 7400 ○ one minute after starting the engine coolant temperature sensor = normal CAN communication = normal ECM5 V supply voltage = normal temperature ≧ 105 ℃ temperature <105 ℃ Unusually high temperatures 2 7402 ○ temperature ≧ 110 ℃ temperature <105 ℃ Abnormal high temperature 3 7403 ○ temperature ≧ 120 ℃ temperature <120 ℃ . DTC recorded in the maintenance screen (DIAG) in. However. users no longer DTC screen display.Monitor Output = Output Monitor Short circuit Fans reverse solenoid valve open from 7208 ○ no output after the ignition is turned ≠ Output Monitor Output = Output Monitor Short circuit Air conditioning temperature signal output (* 1) Open 7209 × from the ignition switch is turned on no output ≠ Output Monitor Output = Output Monitor Short circuit BZ cranes open after 7210 ○ no output from the ignition switch is turned ≠ Output Monitor Output = Output Monitor Short circuit REL rotating lights and lock open 7211 ○ bucket from the ignition switch is turned on no output ≠ Output Monitor Output = Output Monitor Short circuit Lock rod from the solenoid valve open 7212 ○ no output after the ignition is turned ≠ Output Monitor Output = Output Monitor Short circuit Pump output proportional valve open without current ≦ 30 mA 30 mA after 7240 ○ engine start <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A Pump flow proportional valve open without current ≦ 30 mA 30 mA after 7241 ○ engine start <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A After the fan proportional valve open 7242 ○ engine start no current ≦ 30 mA 30 mA <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A After the big boom proportional valve open 7243 ○ engine start no current ≦ 30 mA 30 mA <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A After the arm proportional valve open 7244 ○ engine start no current ≦ 30 mA 30 mA <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A Deviation proportional valve open after the engine starts 7245 ○ no current ≦ 30 mA 30 mA <current <3 A Short-circuit current from the ignition switch is turned ≧ 3 A Show “×” the project is not “abnormal electrical system” message. DTC recorded in the maintenance screen (DIAG) in. However. users no longer DTC screen display. . low voltage AC motor 7420 ○ 10 seconds after starting the engine pressure ≦ 10 V power generating pressure> 10 V Coolant level is too low 7421 ○ no level switch is open level switch off the ignition switch is turned from Low engine oil pressure after 7422 ○ abnormal engine start 30 seconds oil pressure sensor = normal CAN communication = normal ECM5 V supply voltage = normal pressure ≦ 40 kPa pressure> 10 40 kPa Air filter clogged 7423 ○ 10 seconds after starting the engine without vacuum switch on the vacuum switch off Back to the oil filter clogged 7424 ○ 10 seconds after starting the engine oil filter pressure switch back to normal pressure switch off pressure switch open (4) mechanical failure [7600-7799] Fault location fault codes determine the timing of the failure mode occurred prerequisite judgment recovery judgment The conditions DTC display CAN Bus Bus after 7600 ○ unusual open bus from the ignition switch without disconnecting or passive failure condition is not satisfied Abnormal condition monitor communications receiver after the ignition switch from 7601 ○ no monitor is not open packets sent occurring not established Conditions for receiving information packets sent Exception Monitor error occurred is not established Communication ECM timeout 7602 ○ condition after the ignition is turned from no information has not issued ECM does not hold Controller B Communications timeout 7603 ○ Choose from the ignition switch is turned on there is a crane or anti-interference controller B information has not issued condition is not satisfied Conditions controller S communication timeout after 7604 ○ opened from the ignition switch S does not send a message without a controller not established occur ECM mismatch 7605 ○ 10 seconds after starting the engine models only select models ≠ ECM calibration number invariably reply EEPROM data anomalies 7606 × from the ignition switch is turned on without the last store to check ≠ The calculation checks and store the last inspection = The calculation checks and Show “×” the project is not “abnormal electrical system” message. In addition.7404 ○ abnormal high temperature oil 1 minute after starting the engine oil temperature sensor = normal oil temperature ≧ 95 ℃ temperature <95 ℃ Abnormally high temperature pressurized backward 1 7405 ○ supercharged engine start one minute after the last-air temperature sensor = normal CAN communication = normal ECM5 V supply voltage = normal pressurized air temperature ≧ 80 ℃ backward backward pressurized air temperature ≦ 70 ℃ Unusually high temperatures 2 7406 ○ booster backward temperature ≧ 90 ℃ temperature pressurized backward <90 ℃ No abnormal voltage. Analysis and diagnosis of faults. according . (1) Visually: ① Check the engine drive belt wear is serious. refrigerant shortage. ⑥ Check whether the system piping scratches. there may be a leak here. As is clear. and operating under the compressor stationary state. ⑤ carefully check the refrigerant pipe and fittings shall be clean and free of oil. ⑨ observe refrigerant sight glass flow from the state: first starting the engine. terrain broad overhaul cool place. (1) manifold pressure gauge to check: the manifold pressure gauge connected to the compressor high and low detection interface. but no air conditioning blow-out. Intuitive method: through an intuitive feeling is to determine whether there is a fault. away from ignition sources. vehicles should be parked in a well-ventilated. if the oil lines. sustained two minutes. the refrigerant can be carried out by increasing the difference between the bubble remains as eliminated.[Air conditioning failure] excavator repair air conditioning system failure Sep 8. icing. then the cooling pipe containing air. Instrument measuring method: mainly to test checks through the manifold pressure gauge. (2) ears: ears that listen for the fans. crushed or broken. water. injection of the refrigerant. and then observe the state of the refrigerant flow from the sight glass. 2. water. is generally used visual. (3) feel: that the hand check the belt tension. no damage should be neat. multimeter. failure analysis and diagnosis Before troubleshooting. feel Drier temperature and out of the tube should be no difference. ears. ② Check whether the correct compressor pulley. if dirt contamination of the system has been described . hot water valve opening and closing if freely. if the bubble. feel intuitive method of measurement and instrumentation testing Combination for. then the leakage of refrigerant is. then the lack of refrigerant or refrigerant containing air. the compressor is firmly installed. bending dead fold. if it should be ruled out. Also. to be able to press 7 ~ 10ram appropriate. clean and free of congestion. with or without external components frosting. Forcing an intermediate position of the belt 98N can be used. the requirements of elastic fit. refrigerant should be discharged again evacuated. if any should be cleaned up. needs cleaning. ⑧ machine running for some time. well-ventilated. ⑦ Check the water line connection is reliable heating. ④ Check the evaporator should be clean and free of obstructions. then the refrigerant leakage has. making it stable at a certain speed. 1. thermometer. leak detectors and so on. ⑧ Check the condenser fins. 2014 | Repair Manual How to One. if oil. compressors and air-conditioning system sounds normal. pressure. leak oiler. too big too small have said is not normal. high pressure valves for 1. the low-pressure valve pressure is the pressure 0. (2) the surface is dirty. Three. clutch slippage. so the deterioration of thermal performance. the condenser temperature of the outlet tube is about 50 ℃. Common causes of system failures and .45 ~ 0.to the reading table. the condenser inlet temperature of about 70 ℃. (4) with a multimeter to check: Use a multimeter to check whether the system circuit normally- off. electrical components are working properly and so on. (2) When the system desiccant temperature. the switch continues to open. When the ambient temperature at 30 ~ 35 ℃. but not washed with high-pressure water in order to avoid fin deformation. it is timely for the system to be cleaned. cylinder head leak. overheating and ablation. Low voltage switch: When low voltage switch is turned to work.13 ~ 0. remove the check. the system components common faults 1. causing damage to the solenoid coil. repair welding process should be carried out. indicate cooling system properly. fan maximum speed. cylinder rupture and leak before the shell O-ring seal is not good cause and so on. Clutch: (a) with fixed compressor. Second. and second. mainly the fault is high or low pressure system appears. there is water vapor in the system. reservoir under normal conditions is about 50 ℃. the best thing as air-conditioning switch. remove the dryer. larger if the water vapor within the system. 6. Compressor: (1) leakage compressor shaft seal leaks. causing overload mating surfaces slippery. Tank: (1) tank desiccant filter is damaged. leak out of air intake. Condenser and evaporator: (1) common failure is due to vibrations caused by leaks. If the system of internal contamination. desiccant leakage. the pressure is too high. the clearance value is generally 0. Expansion Valve: The most common failure expansion valve is clogged. causing refrigerant leakage. if not comply should be replaced. can find fault. the contact is good.20MPa. application brush and water to clean. including leaks.75mm. (2) checking by the thermometer: the air conditioner is working properly. the compressor speed in 1800 ~ 2000r / min. insufficient refrigerant inlet valve discharge valve spring or spring break.47 ~ 1. (2) fixed coil and rotating parts of friction. 2. effects of heat conduction. 5. 3. evaporator under the premise of no frost. (3) the clutch gap misalignment. replace the desiccant. one system cleanliness is not good. (3) Leak Check: You can check the leak tightness through the air conditioning system. easy to make fusible plug to melt. distortion. causing blockage of reasons. (2) abnormal sound appear abnormal sound may be improperly adjusted air gap. the outlet temperature is usually around 10 ~ 14C ℃. 4.67 MPa. solenoid coil resistance of a few ohms. Pressure off control is to reduce the work function of the overflow losses. thus ensuring the effective use of engine power. . The effective use of an engine power Detection has been set speed and actual speed of the engine. 3 Flow Control NC valves and jet sensor using functions implemented. the following table lists the common faults and causes of air conditioning systems. These faults are concentrated expression: System no refrigeration. malfunction. the pump discharge oil is minimized. ineffective or produce abnormal noise. even if the job load changes. so that the system can be used to reduce the work loss of hydraulic pressure. etc. 2014 | Repair Manual How to OLSS system Features: OLSS (open center load sensing system) is a swash plate type variable piston pump by controlling the swash plate angle (fuel supply) to reduce the fuel consumption of the energy- saving system. the pump displacement (swash plate angle) will be controlled.. Optional four kinds of work conditions: heavy. such as refrigerants and refrigerant oil caused. Because the actuator does not work. fine control and improved control of the pump flow.Troubleshooting air conditioning systems can generally be divided into: electrical failure. the pump discharge of oil through the oil channel in the center of each stem. mechanical failure. Design of a pump with the conventional system the engine is different. 2 pressure off control CO functions implemented using the valve. Load of the engine is always kept constant. so called open center load sensing system. When the outlet pressure of the pump close to the set relief pressure. standard. [Hydraulic system fault diagnosis and troubleshooting] characteristics and working principle of the hydraulic system Sep 12. fine and lifting. a hydraulic pump may be greater than the power output of the engine. CLSS system Features: Mining operations are not subject to the micro-loading effects steady. 2 pressure cut-off function . When you need a working device micro-movements. supply the required flow. the fuel consumption can be reduced to improve fine control hydraulic pressure loss reduction. Cutting using pressure control and flow control of the hydraulic system can significantly reduce the heat. Compared with the traditional system. the pump discharge oil minimized to reduce waste control valve in position when traffic. the pump discharge oil best time increases the microcontroller performance composite operating performance to achieve optimum control. TVC valve. CO NC valves are valves and constant torque control valve shut-off valve and negative pressure control valve. to meet the constant power of the premise. the total power of the variable. How it works: By TVC valve.When the joystick in the neutral position. and only operated valve opening amount that handle control lever angle related. TVC valve. LS valve. valves and actuators (cylinders. the pump flow rate to change the switching point of the LS valve (LS set differential pressure). Four kinds of pumps —– valve control function 1 LS Control Function According to operation of the actuator and the engine speed changes from the LS. so that in the closed position the load sensing system. Because the actuator does not work. The main pump by the pump. use the main stem of the actuator stroke control compound action more accurate. Reducing waste fine job of traffic. motors) control components. the pump discharge of oil is not the center of the valve stem oil through various channels. EPC valve to the outlet pressure of the LS valve. may be issued in accordance with the joystick on the pump flow command stroke. CLSS system consists of a main pump (two). Therefore. the pump displacement is independent of the external load. Using a computer and an electronic control system can control more accurate and sensitive. Pi CO pressure control valves and variable valve NC swing angle of the pump (pump displacement). 5MPa. When the pump outlet pressure exceeds the set pressure. 3 two relief function through When the job is often a relief pressure of 32. the pump flow is allocated according to each stem stroke and with the implementation of components independent of external loads. 4 micro-controller function if you choose microcontroller operation mode. . you can control the LS valve of the pump. When the compound action actuator control valve outlet pressure compensating valve on the main stem downstream pressure is kept constant. The working principle of control of the main pump swash angle. When the secondary overflow feature to work. pump controllers and TVC valve functions implemented.5MPa. 2 Check the actual speed of the engine speed sensor and its set speed compared to that change by changing the pump displacement pump input torque to make more efficient use of engine power. in order to improve the performance of micro-operations and trimming accuracy. the operating force is further increased. the pump swash angle becomes larger. reduce the pump discharge oil. If the pressure differential is greater than the value of LS LS valve setting. pressure sensor and unloading valve.Use of pump pressure sensor. so that the differential pressure across the valve LS LS unchanged. a variety of sensors and switches the signal into said controller. flow distribution. The controller outputs control signals to the various components. Also control the hydraulic system flow through pumps. to control the flow rate of the system. A load-sensing. the pump discharge amount of oil is minimized. such as solenoid valves or the pump displacement engine throttle control motor. At both ends by the main control valve pressure regulating optimal displacement pump flow to meet the actual needs of the actuator. If the pressure is less than the pressure value LS LS valve setting. including variable piston pump. while improving operating efficiency. A valve controller and an engine controller integrated in the microcomputer. The system is closed center load sensing system. This will not only save energy but also to precisely control the speed of the actuator. valves and other components. speed sensing. EX-2 control system The system includes a pump control system and a valve control system. the overflow pressure rises to 35 . the pump swash angle becomes smaller. condition selection control. Features Can achieve load sensing. Therefore. the solenoid valve controller instruction compensating valve flow proportional valve control execution flow element. 2014 | Repair Manual How to 1. The composite action of the differential pressure sensor sensing only the high pressure control valve. reduced pump swash angle. all hydraulic oil tank are refluxed through the sensor. what is the nozzle sensor? When the dispensing valve is in the neutral position. What is OLSS system? Komatsu excavator OLSS system is open-center load sensing system. such as the special requirements of different kinds of work for the implementation of components. When the dispensing valve is in operation. Variable system is to use the differential pressure signal to achieve variable. the oil passage is shut off.6Mpa. Works When differential pressure sensors that control the pump outlet valve outlet pressure is less than 1 5MPa. the pressure is substantially zero. valve controller instruction to increase pump displacement solenoid pump swash angle. According to “feel” the action signal. Pt pressure instantaneously drops to zero. When the job due to the action of the system can reduce the loss of hydraulic pressure. It is by controlling the swash plate type variable displacement piston pump swash plate angle of approach. smooth operations. ie Pt pressure is 1. Pd and tank connected. Although the implementation of the different elements of each external load.3 flow distribution flow distribution control so many can be done with a single pump actuator composite action and provide the required flow rate possible. This system is a subsystem of the flow distribution control. in order to reduce the fuel consumption of energy-saving systems. 2. A sensor has a throttle and relief B.6Mpa. 4 Select control this condition variable pressure compensating valve system adjusts to provide the most jobs speed. . when pressure is greater than 1 5MPa. Komatsu excavator maintenance and technical knowledge Sep 12. pressure relief valve overcurrent 1. control the pump output. to increase the fine control. TVC valve structure and working principle is what? TVC valve is a drain on the main pump pressure Pp1. then the throttle lever position remains unchanged. which automatically reduces the engine speed. excavators work will be affected. that is. . the engine will start when the excavator flameout. pull the lever to the working position without moving the throttle lever engine speed automatically accelerate to the crude door working position speed. Once the Pt pressure is too high. balance spring force to be controlled. hydraulic cylinders extend. When the load of the main pump is large (when switch S is turned on state). the flow rate also will be smaller. Therefore. since the cutout a hole on the valve spool bore and b the oil is throttled. the job will be lost when the machine is fine-tuning the role. 7. the reason is the pressure relief valve of a foreign body stuck. due to the discharge of oil pressure of the main pump Pp1 and Pp2 low. electronically controlled automatic deceleration system OLSS How does it work? When the job at the middle position lever mechanism. When the switch is turned on in the L state. and job agencies began job. a slide valve 2 is pushed to the lower end of the spring. the oil pump control pressure Pc and the discharge valve TVC output becomes the same as the pressure Pt2. 4. there is no automatic functions. when no movement industry organizations and travel agencies link (in the middle position). At this point. Pt pressure is too high and too low impact on variable system? Common faults sensor Pt pressure is not normal. to enhance the effect of the spring 1. the piston is pushed outside the spool 2 is moved upward. no excavation work force opportunities arise. the flow is also the largest. As a result. the electromagnetic valve 7 is powered on. and sometimes even higher pressure will reach 5Mpa. the servo valve so that the piston the inclination angle becomes smaller. if the pressure drops to zero. If the job agencies began work immediately closed solenoid valve. Therefore. make piston flow becomes very small. TVC valve solenoid valve on the line fails. hydraulic rod and governor lever handle is automatically reset to the original position. when the output pressure Pt2 drop TVC valve.3. the computer sends a signal from the control box starter solenoid valves. the engine speed will be reduced to the industry 4s 1150r / min. TVC valve output pressure Pt2 becomes maximum. speed is automatically restored to its original speed. When the main pump load hours (when the switch is turned on L state). and the hole and c b hole (discharge hole) of the opening becomes large. after Pp2 and TVC valve output pressure Pc2. Will automatically switch to the deceleration ON. the shaft 6 pushes the piston 5 moves upward. When the solenoid valve line failure. piston flow becomes very large. since the main pump delivery pressure Pp1 and Pp2 increases. the servo valve piston tilt angle becomes so large. If the pressure is too low Pt. Since the effect of the cut on the valve spool. at which point the adjustment screw and then exit the semi-circle. If there is still no change. observe the engine speed changes. CO valve output pressure drops. so that T. the two pumps. CO valve is divided power regulator. . and Figure 3 shows. just like TCC valve. the pump flow is also the largest. not too much). V. if there is no reaction. 8 What is the role of CO valve? Its structure and working principle is what? CO valve is divided power regulator. Komatsu PC200. can adjust the screws a little try. To adjust. Because the parts are many. b and c bore hole to the discharge hole is widened. C valve output pressure valve output pressure Pt equals CO Pc0. Structurally complex TCC valve failure abound. Both thrust over a stretch of the spring. the slide valve 2 Bianxiang on mobile. Therefore. the big arm raised to the boom overload relief valve overflow valve. then adjust the screws into some until the lifting arm felt when the engine load. if the electronic control part is broken. installed a few. 7. sometimes the problem is here. hydraulic adjustment within the specified value (32Mpa) then TVC valve adjustment screw spin out some. which is the TVC valve adjustment screw on the right? Have a great relationship. plus Pc0 pressure pushes the piston 4. If the engine load is not heavy. which means it can only regulate themselves a piston flow. Using the same method to enhance the arm again. 6. At this time. the engine will stall when starting to walk. When the oil discharge pressure of the main pump is less than the pressure regulator overload pressure. From Figure 2. when the lifting arm will turn off the engine. the average user can not arbitrarily to adjust. a passage hole to the narrower hole b. Pp2 push the piston 3. TVC valve uses only one two three-way valves to regulate the hydraulic pressure Pc. so a bore hole and b turn to each other. can be screwed into the adjusting screw and then some (semi-circle around the thread. TVC valve adjustment screw on how to adjust? When the machine manufacturers have adjusted the factory. and therefore. lifting the arm again until confirmed no load arm raised. or installed in the wrong direction do not know. Throttle. to be especially careful during disassembly. Many users because no parts diagram. the servo valve so that the piston the inclination angle becomes smaller. the servo valve so that the inclination angle of the primary pump reaches a maximum. Flameout occurs when launched. speed is not can be significantly decreased. When the main pump discharge pressure is close to the oil pressure regulator overload pressure. Their functions are the same. PC300. pump flow also will be smaller. but it is not absolute. a slide valve 2 is pushed to the following spring. and observe the changes in engine load and speed. the output pressure becomes maximum CO Pc0 valve. the method is to install a pressure gauge in two piston pump oil outlet. PC600 excavator TCC valve with TVC valve any different. the screws should be transferred back to the original position. TVC valve function just more electronic control. PC400.5. while the TCC valve 3 with two two-way valves to regulate the hydraulic pressure Pc. the hydraulic pressure applied to the chamber C is slightly increased. but the principle is the same.6MPa). Thus. one Pt mouth. NC valve output pressure increases. 11. and even some tubing wrong and so on. construction PC300-2 and PC400-2 excavator NC valve is somewhat different. the output pressure of the jet sensor Pt piston thrust force of the spring is greater than the jet pressure Pd of the sensor and the other output. b bore hole and a pilot valve is . see Figure 14. PC200-5 excavator shown Pt NC port and the valve port Pd. The inclination angle of the servo valve so that the piston becomes smaller. Relationship between the jet and the NC valve sensor shown in Figure 15. 10. So spool up reset. no clean when cleaning the assembly. so often seen in this part of the fault. will be black smoke when mentioning the big arm. the signal pressure to get NC valve Pt and Pd. At this point channel c and b bore hole between the narrow channel between b and d bore hole (exhaust hole) widens. Pump flow rate becomes smaller.9 What is the NC valve? Construct NC valve is like? NC valve is of evolution from the early PNC Komatsu variable system. To achieve zero pressure. the excavator will be a heavy load. Its working principle is: When the control valve is in the neutral position. the d-hole of the control piston acting on the cavity C. Return pressure difference is in the position signal and non-middle position and asked to control the NC valve moves up and down to control Pc purpose of using hydraulic distribution valve. the pump control pressure Pc is transmitted to the b holes. When the operating lever is pulled. if not assembled. the inclination angle of the servo valve so that the piston becomes large. Due to the structure of NC valve is relatively simple. once reversed. we must figure out NC valve 2 hose connector. and just to get equilibrium controlled. reaches a minimum value. the pressure difference (Pt-Pd) narrow jet of the sensor. so much trouble. When the input signal pressure Pi. Since moving. NC valve is a sensor output of the jet by the NC valve output pressure Pt and the pressure Pi and the output pressure with the NC valve spring force of the jet sensor. c between the hole and the passage hole is widened b. the control piston and the spring push the left. If Pi is slightly increased. the pump flow rate increases. the jet pressure sensor reaches a maximum (1. Accordingly. Komatsu PC200-2. and the other is Pd mouth. the left rocking. so the spool is pushed down. so the output pressure valve NC Pi becomes minimum. so that the pilot valve to the left. to the servo valve piston lever arm as a fulcrum. servo valve important variable in the system do? You can say it’s a very important role because of its relatively high operating frequency. the relationship between the sensor and the NC valve jet is like? NC valve is a signal sent by the sensor work on the jet. Therefore. Jet sensor is out of the control valve after checking the return flow back to the tank. there are many small problems are man-made. the pressure Pi in the drop chamber C to move the control piston. with the servo piston with a gap caused by too large. and c is turned on the excretion hole loop. the oil flow into the servo cylinder chamber A.turned on. push the servo piston moves to the left. hole boring when repairing first round. At this point. In addition. the track speed is changed. After all. so that the pump flow becomes smaller. then the servo valve in the pump before the pump or corresponding. and then grinding. 13.10mm according to the aperture. so that the guide and the spool moves to the left. To maintain the side of the track to be kept from the top to rotate. After the repair has become larger aperture. the slide valve moves the guide loop is cut off between the hole and a hole b. First inability to walk from the top side of the track. if both internal and external adjustment screw to adjust the rotation of the track is still very slow. b and c hole hole phase. with the hole blocked b and c a well bore and excretion circuit corresponds to an input signal R of the discharged oil pressure is increased. A long time for those machines should be adjusted after each pump and pump the front were. and the cutting holes between b and c bore hole and a drain hole. so that guide movement of the spool to the right. on both sides of the track to rotate somewhat faster. according to the pore size after the repair. Thus. what reason? A servo valve orifice chamber and chamber B is increased due to wear. the pump control pressure Pc passed to the servo valve piston chamber B. the lever arm is a pin as the center of rotation in the counterclockwise direction. go with the Pistons. so that piston tilt angle becomes smaller. you can put both internal and external adjustment screw spin out some more. First unscrew the adjustment screw a half turn. 14. 12. After repairing the surface of the piston to be heat treated. Then the adjustment screws are screwed out within a half circle. so that piston tilt angle becomes larger. in order to observe the effect of the adjustment. when the screw is screwed out of a half circle. servo valve adjustment screws should be how to adjust? Servo valve of adjustment screws are adjusted at the factory. the lever arm as a fulcrum to swing the servo piston to the right. but still not meet the requirements. This is the servo arm broken stem or bolt fell out. if it is original to adjust properly. after the adjustment of the servo valve. Bore wear generally has appeared obvious steps and out of round. the flow increases. bore and piston about 0. the servo piston to the right. will affect the driving force of the piston? . and should not be adjusted. the input signal is equivalent to reducing the residual oil discharge. When the arm lever the pin as the center of rotation in the clockwise direction so that the pilot valve moves to the right. while the piston repair set to go with the gap size. after the repair of the piston size has been changed. Description of the situation where the servo piston moves rightward as follows: Suppose the servo piston in a position in equilibrium. PC300 excavator and PC400-2 excavator is 26MPa. look at another gauge pressure. as long as the overload overflow valve still flow. If PC200-1 type and PC200-2 type machine. the same way. we can find that there are leaks inside the machine. and see if it reaches a predetermined value. the pump discharge port and tubing seals the connection part will have leaks. still not adjusted in the two pressure regulating valve effect. There are two well-degree spring spring. Regulator checked debugging can be installed. pointer readings should not drop down to illustrate the leak. The leak can be checked by the following way. the gap is large. Daily work in the machine. the noise was relatively large. if the oil level drops quickly. If the pressure is less. fatigue is the reason? On the above. remove the two high pressure flowlines. the solution is to reduce the hydraulic pump can be controlled a little. After removing the regulator should carefully check before conclusion. the middle of a damping piston hole. but soon fell to 20MPa. because the control pump has a pressure regulating valve. Komatsu excavator pressure regulating valve structure are the same. The pump in the hydraulic oil exhausted. if the valve is faulty adjustment controls also enhance the pump pressure is not up. 18. Then stepped on the gas. in addition to describing pumps have internal leakage. cone valve and poppet valve on the pressure regulator are all affected. but not very obvious. the pressure is not enough to control the pump has been damaged? Such a conclusion can not be.Have an impact. PC200 excavator is 26MPa. PC400-5 and PC400-6 machine is 32MPa. and then poured into the tube in the mouth with a diesel. how to check the leak? There are leaks inside the machine are generally old machine. when the control pump pressure reaches a predetermined value while the machine is still working. PC400-3. 58. check carefully to check whether the damping orifice blockage. so that the bucket cylinder rod extension do so overload relief valve in the overflow state. If the regulator found no fault on the third step further examination. indicating that the pump has internal leakage. in the measurement of pressure. and is synchronized wear. you can determine the control of the pump is damaged. 16. 17. is this normal? Not normal. if the control of the pump pressure remains less than the required value.8MPa with two hydraulic tables were installed in the two main oil pump outlet pressure taps. examination and inspection methods to control the pump pressure regulating valve same. the following steps can be checked. In general. to remove the main pressure regulator valve (also called the main valve) for inspection. Ie check whether the internal pump leakage. This is a pilot operated regulator’s regulator. wear parts is more serious. . the temperature rises quickly. 15. to achieve the specified value at the beginning. then there should be a high value a hydraulic table. It is the main reason for the pressure to enhance the impact. The key is to check whether the plane perpendicular to the centerline of the cylinder block and cylinder have changed. this time a chamber of oil in the flow state. But also pay attention to the . when the pump starts to work close to the shoe of the swash plate. so that the shoe is gradually pushing the gap h. under its reverse thrust greater than the pressing force F N. then P ‘= P. This is because the valve plate and cylinder contact surfaces are not smooth due mostly with grinder mill maintenance or by hand grinding. and is a new equilibrium state. and there is a strong attraction.05mm. and the plane of the shoe in contact with the swash plate. A chamber oil leakage through the gap and asked to form a film. so the pressure oil through the orifice P f and g to A cavity. test the following methods generally available. The shoe is such that the balance of the process. pumps repaired several times. and then pull back the plunger. you can add shims. and hydraulic oil chamber A and P ‘and slipper and swash plate gap the liquid pressure on the shoe a reverse thrust F. Exclusion approach is. if it is flat grinding biased. tubing will jump more powerful. difficult to measure. Another aspect. high pressure oil will be from between the valve plate and cylinder leak. whether the center line and valve plate end vertical valve plate has changed.19. the number worn piston plunger will produce the leak? In theory. in this state. are inadequate allows the cylinder and valve plate clamping force. or a little butterfly spring loaded and various other reasons. you can use the handle to check that the required two hands to the pump shaft head twist. When the oil pressure exceeds the clamping force. causing oil pressure fluctuations. so that in a relatively quiescent state. In addition. because the oil in the oil chamber A does not flow. If the column Sierra does not move. piston cylinder has repeatedly Grinding. F in the case of the anti-thrust force and the stopper is equal to N. that the formation of hydrostatic bearing. to produce a normal shoe pressing force N. so that the surface of the swash plate slipper pressure. and to re-grinding. 21. 20. that the ball head plunger seal the holes with your fingers. the sliding shoe is in an equilibrium state. pressing force size. as well as the spring force of the cylinder on the decline. or should be replaced with new parts. grinding quality problems. oil pressure P acting on the piston. the gap between the plunger and the plunger hole should not exceed 0. so that the shoe swash plate to maintain a certain film thickness. you can see the oil pressure gauge the magnitude of the big swings up and down. so P ‘is less than P. pressing force is enough. and can be rotated in any direction. When the throttle is even greater volatility. due to the orifice f and g resistance loss. so that the shoe and the formation of a layer of film oblique cross-examination. Due to the small pore size. high pressure hose when excavator working two piston vibration badly what reason? If the oil pressure gauge installed in the pump outlet pressure taps. hands plunger orifice also sealed. since the machine is old. spring force is not enough. Slipper in oblique intraday How does it work? Ball plunger head and the inner spherical surface contacting the shoe. with the gap shows comparatively good. until making reverse thrust and pressing force F N is equal to date. the plunger through the hole g f holes and put the shoe on the oil pressure lead to the A cavity. When the pump. 22. grinding gear end pay attention to what? Gear pump gear worn. To clarify the truth. the oil chamber C through the cone valve back to the tank. so that the hydraulic chamber C not be established. the poppet valve is reset. C C chamber cavity pressure is much lower than the system pressure. remove the orifice clogging it. a hydraulic oil 24. due to the damping effect of orifice. strong sense of responsibility to find the master operation. Because the table is slightly unclean. the system pressure by a small piston overflow tank. C chamber and system pressure loss of balance. shape geometry can not be out of tolerance. Figure 24 is shown on the mill for grinding by hand when the drive shaft can rotate continuously. use high precision grinding machine for grinding. So repeatedly performed to adjust the system pressure. why the blockage will affect the orifice so big? This is a common fault. Because of the small spring action. also are in the overflow state. so the small piston back to the left. In this case. Remove the valve can be cleaned. will make a vertical line plane bearing hole grind shifted. but also a great influence on the hydraulic system failure. after the pump gear shaft . High port plate plane roughness. the impact will be great. is the reason? The reason is that the majority of hydraulic oil is not clean. If the small piston in the middle of damping holes are blocked. 25. when the excavator to work properly. the principle should be introduced on a pilot safety valve. System pressure regardless of the level. So when the tiny orifice Once blocked. followed by a small piston has the right to reset. If the face and the bearing hole verticality changed. Oil pressure P through now orifice into the cavity C. then C chamber pressure P is equal to the system pressure. 26. dust is not allowed on the platform. too tight will not be established because the cylinder and valve plate between a certain thickness of the film. so the small piston has been in the left position. When the oil pressure chamber C up to a certain value. 23. the best their hand grinding. upon inspection orifices are not blocked. For example. C chamber pressure plummeted. When the system pressure falls below a certain value. it is easy to overheat the plane burned. bench grinder to be absolutely clean. tiny dirt clogging the valve piston in the middle of a small orifice.pressing force can not be too tight. because the end face of the gap is very small. That is up to the cone valve regulator value. how to know the gear plane bearing hole grind verticality changed? Only found in assembling the gear pump. there will be side tracked but suddenly can not move and digging arm fatigue. generally about 0. Therefore. the piston has been pressed to the right seat. the pressure relief valve why still tune it up? Most such cases are closed due to lax cone valve and valve seat. the cone valve open. not pressure oil.05mm. passive gear flip line contact points can meshing gears change. to add a little oil before hand to slightly rotate. If the locking screw is loose a little. the main bearing clearance is too large. Komatsu 200-3 type to PC200-6 excavator. not inverted. but by a mechanical lever pulled directly by hand. Travel motor for safety protection system. Re-use. This is because the supply shortage walking piston motor traffic. 29. the majority of the flow control valve is not adjusted good reasons. 30. resulting in dispensing valve springs here to go there when the shift lever is very heavy (the other direction is less). For passive gear. When the excavator to do another action the same time. it means another plus a piston flow. can flip 180. Since the end face of the pump wear. 31. but still turn Debu smooth. while the crawler can only move forward not backwards. the system pressure is lost. Because the side of the gear wear will occur. or distribution slide valve had worn so with slip valve hole gap becomes larger. and then dismantling the gear pump. so that the formation of high pressure inside the hood. if there was an overload relief valve stuck in the overflow location. pulled walking excavator joystick feel very heavy (almost pull does not move) is the reason? Walking assign different distribution valves and other valves. high-pressure oil will leak from the oil path through the slide valve clearance to the end of spring. not necessarily the pump has been damaged. the engine speed will drop in an instant. when assembling the gear pump pay attention to what? Wear in the pump casing into the oil chamber would be more a little more. 27. Pump assembly is completed. the spring but also have a spring cover tightly cover forward. touch to flow. end there scratching marks. What is the reason? Is walking in the motor overload relief valve core is stuck due to death. set up two overload relief valve in the system. what reason? This failure will occur on many excavator. 32. why? . while the track go very slow. or even turn off. 28. Most machines assigned to walk hydraulic control valve is not. the end surface of the bearing assembly are also at the same time to replace? Must be replaced. Piston flow shortage. if the pump housing is symmetrical. so that the swing gears resulting in rotation.assembly is not active. simultaneous operation of two crawler excavators walking joystick makes the start. will merge in a straight line with a valve. do mark when removed. Because the machine obsolete. but you can get up if the track while doing a rotation action. two can not be swapped. Driving gear is integral with the rotation shaft. This is not the end face of a plane perpendicular to the bearing hole caused. 2 pump flow at Komatsu 200-2 excavator control valve will be merging. can pay a butterfly spring. the spool to the spring brake shifting the direction of the hydraulic oil to the motor brake. walking oil 马达刚 repaired. if it is butterfly spring. two four-way solenoid valve to the right to control oil through the solenoid valve spool to reach the lower end of the slide valve moves into the servo valve on the high . resulting in an overflow room flat. it must be checked for leaks reciprocating valve. small throttle when the track go faster. The remedy can be added in the spring washer. it is almost synchronized. you should check its linear control valves. it can not shift. When small throttle hydraulic small. so that the pressing force plane and the cylinder valve plate is not enough. and that is different from the two piston sent the oil flow rate (how to adjust the pump flow. oil pressure P oil all the way through to reach the brake shuttle valve spool. the safety valve will be raised a little less stressful side. If you are type 3 and 5 machines can not walk a straight line. just do not give a solution Oil pressure motor. Excavators slope not stop. resulting in a large throttle when the track but could not move. If the pressure on both sides are the same. devoted in part 2). The brakes are loose brake. easy to leak between the plane and the plane. and in the system there is a reciprocating valve of the motor 2 are mounted on the circuit. failure is what makes excavators can not walk a straight line? Is usually caused by a hydraulic motor oil on both sides to enter different sizes. the piston is still a lot of traffic. naturally go faster. this switch controls the oil to go through to get to the solenoid valve control valve variable speed skating. 35. Hydraulic oil P before entering the travel motors. 33. oil all the way into the A-side first shuttle valve. This is mainly a problem with piston variable agency. the brake device from the braking action. If the solenoid valve is broken. large side hydraulic. controlled speed in the cab of the electromagnetic switch. the shuttle valve and brake is automatically reset. oil pressure when the throttle is increased. 36. When the oil supply to the motor is stopped.This failure is more common. the motor starts to rotate. the shuttle valve has broken pipeline flow of oil. Machine in idle state. if the pressure difference is large. why can not stop excavator slopes? Generally excavator can be stopped at the ramp because excavator pump itself with brakes. motor brakes while braking. but will not go when the throttle is what causes and what remedy? This is because the repair milled valve plate and excessive amount of grinding. Since oil can not flow from the shuttle valve is a braking action. Available 2 oil pressure gauge checks were installed on both sides of the pressure taps running motor oil. When you open a fast stop. PCA00-3 excavators why there is no quick stop? Skating valve control oil change is coming from the control pump. 34. the reciprocating valve to B shift. motors can be rotated. if the brake solenoid valve is faulty or the control line failure. motor gave out the oil distribution valve foreclosed. 43. can lead to not open the motor brake. can not pass the signal sensitively. 39. why? This situation only occurs in type 1 and type 2 Komatsu machines. the rotation of the motor can not rotate the turntable is the reason? From Komatsu excavator type 3 to 6. the motor will not stop failure occurs. the back wheel rely stopped? Stop to motor oil. the hydraulic oil will overload valve in case of overflow. What emergency measures? The main function of the solenoid valve is to make two 3-way valve and move around to cut off or turn control of the oil. the servo valve piston pushed. it will give a signal to the two hydraulic piston total power regulator. if the turntable rotation speed brake solenoid valve is broken. to reduce the number of piston flow. when the rotary dial is difficult to stop in position to stop what reason? This is a rotary motor lock function deteriorated. 41. just walking motor with automatic brake device and the rotary motor did not. in the meantime the solenoid valve to control oil also entered the lower chamber of the servo valve. 44. thus causing difficult and turntable arm linkage. turntable hydraulic oil filler rushed to what reason? Is a rotary motor shaft seal head is damaged.pressure oil chamber is cut off. Then the motor will not turn to no matter which side. 42. Only two have problems or overload pressure regulating valve is too low. If the control valve is faulty. the structure and working principle of rotary motor and travel motor are the same? Basically the same. When the machine to swing. temporarily without solenoid valves. the lifting arm while rotating turntable excavators appear weak. the motor variables. so that power can be compensated. 37. the turntable can not turn a full circle is enough for what reason? Turntable ring gear off two or more teeth. the operation dial why one direction fast and slow in the other direction? . the turntable has a parking brake. We can put the hose directly to the hose A B connectors. 38. 40. 46. Not with liquid dug models This phenomenon is generally slow side overload valve is faulty. why will stay for a while? This is less than the arm cylinder due to the large oil chamber when the vertical position of the arm down. 45. PC400-5 excavator boom when promoted. Komatsu PC300-3 type. push the small piston hole 4 right. type 2. with OLSS systems. the piston can check four small events. In addition to adjustments should also check OLSS system is faulty. the piston the journal and piston swing frame connection. Check whether the piston stuck in the piston bore. 48. Maintenance to check whether the installed anti throttle arm or plunger pump flow is adequate. and 5 is the same type of machine it? An excavator is the use of early PNC system structure is relatively simple. the engine still smoky how failure should be excluded? You can put the right end of the adjustment screws gradually relaxed.4 into the hole. Variable agency Komatsu three machines and five type machine is more complex. to remove the variable mechanism to be checked.3 and 2. down to the position of the arm perpendicular to the ground when. Make the engine load increase? Because the high-pressure and high-pressure oil pump oil before the pump holes respectively 1. type 3. 50. 47. the excavator Komatsu. the small piston to the right time and the right to push the piston. 49. 2. Check the focus is on the piston bore. what should pay attention to the cylinder repair? In addition to the length must be accurate. thus boosting the swing frame to the right. post-added products in the computer system. 3 and 4 small piston inside. or different rod length distribution valves caused. Engine black smoke is the reason? Is out of control due to the variable agency. . swing frame and front and rear pump is mechanically connected. the pump discharge a small amount of the engine load increase. until able to unload so far. otherwise it would go the wrong rod. called electronic control OLSS system (Chinese name is open-center load sensing system). the large cylinder chamber has been lack of oil. pump swing angle decreases. the variable mechanism of type 1. so they drive swing frame when the right front and right swing pump. if you mention the big arm black smoke. 46. the cylinder flange when welding flange centerline and cylinder bore diameter must be aligned. why the above four small piston is stuck after. Another method is to two cylinders are down. there will be automatic arm outstretched phenomenon? This is to accelerate the distribution of the arm due to stuck valve spool in one direction. Resistance. Pd Pd hydraulic valve from the jet out of the mouth that flows into the rotary distribution valve control circuit. the cylinder tubing head good stop out of oil. the temperature higher than undamaged. PO400-3 excavator why not flip the lever. has confirmed that the boom cylinder seal is damaged.51. A spool is not because the middle position. so that a greater fluid flow resistance. Since the holding valve is provided in the oil passage. The case of C pilot control valve does not work. 0. When there is no manipulation of the rotation. hydraulic rising possible. 52. resulting in a local high oil temperature. PC200-6 excavator boom cylinder piston rod and the cylinder piston rod arm flange discoloration phenomenon occurs (local oil temperature is too high phenomenon). Lead to automatic rotary turntable will happen. turntable will automatically rotate in one direction? To rotate the turntable. which is the first to confirm the clear. but how specifically confirm what a seal? Cylinder seal is damaged. push the dispensing valve to a mobile side. one on another valve. the tubing two small cavities on the cylinder removed. but to confirm the distribution valve slide properly. . Prevent the arm down automatically. so that the hydraulic oil out of the cylinder increases drag. PCA00- 3 excavator arm distribution valve spool has two. A in the middle of the valve body. Go to the extreme when the piston. is not enough to open the slide valve. can be judged to touch. not easy to find. Inspection findings normal. then to the fuel tank. the pump 1. Komatsu excavator why PCA00-2 flip lever arm when the boom is raised. and then into the large chamber oil. there is not a lot of pilot oil into the ends of the distribution valves. turntable distribution valve must be not in neutral position. C and then flows through the upper valve A valve. Secondly then check in P. we can identify the fault is with the rotary flow control valve. A spool is not in the middle position. What is the reason? Because between the distribution valve PC200-5 and PC200-6 excavator boom cylinder to the bottom. Pd pressure oil can not be returned to the fuel tank. and seal the damaged cylinder. there is a boom installed to keep the valve prevents the arm moving down automatically. 54. PC200-6 excavator boom cylinder rod side in between the dispensing valve is also installed one in the arm to keep the valve. tube head will continue to have the oil flow. especially in the case where there is no back pressure of the slide valve is released out of the well. the temperature of friction is large. Komatsu other models do not have this phenomenon. or when walking lever pulled. Once A valve stuck. pump 2 and the rotary control oil distribution valve opening is opened. the valve case from the jet out of the mouth rather Pd zero pressure oil through hydraulic pump 1 N. Rotary flow control valve A. Komatsu PC200-5. 53. there may be purchased substandard parts. Are cambered contact (PC400-3 and PC400-5 type) between the body and buy a new plunger valve plate. Check from two aspects: First decomposition valve parts. overload valve and dispensing valve is damaged. fuel tanks and piping does not clean well. observe the color. use the throttle run-4h. the key is to not put the plunger body and the valve plate were run-in. The method can be manually run-run-in. how to judge? Overload valve failure of judgment Methods: Walking distribution valve plug removed and overload valve on the dress. is the reason? There are many reasons. to be replaced with new parts. and then installed before running the run. colors. Why work fatigue? This should carefully check the servo valve. Second.55. 56. black is a spool leakage has occurred. the contact surface to go through in order to put a good run-in to work. Control the pump output pressure and jet valve pressure is also normal. Komatsu excavator PCA00-3 plunger. PC400-3 Komatsu excavator working pressure is normal. the first run-in with a small throttle for about 4h. excluding the above reasons. 57. check for abnormal color. check valve and slide valve where there is a black site. . and plunger valve plate contact surface is burned. if the slide valve adjustment is likely to be improper to make inlet ports B and C have the phenomenon of communication. piston body and the valve plate to replace a new piece of work after less than half a day. indicating overload valve is faulty. if the arm is no longer declining. indicating that this part of a string of oil. distribution valve failure of judgment method: Pull out the distribution valve.