Engine Oil Pump - Inspect
发动机机油泵供油管的进口滤网可能会有阻塞。 该阻塞会导致气穴的形成和机油压力的降低。 如果机油泵供油一侧发生漏气，也会导致气穴的形成和机油压力的降低。 如果发动机机油泵旁通阀保持在开启位置，润滑系统会无法达到最大压力。
Caterpillar Information System:
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1631 - FMI 03
SR4BHV and SR4HV Electric Power Generation Connection Diagram - SR4 HV ; SR4B HV Drawings of Factory Installed Options
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1431 - FMI 03
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader MID 081 - CID 1327 - FMI 04
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1430 - FMI 03
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader MID 081 - CID 1327 - FMI 03
SR4BHV and SR4HV Electric Power Generation Connection Diagram - SR4 HV ; SR4B HV Factory Installed Options
938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Power Train Brake and Planetary
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1433 - FMI 06
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1433 - FMI 05
2002/10/07 A New Mounting Plate for the Steering Stop on the Front Frame Increases Service Life {7051}
SR4BHV and SR4HV Electric Power Generation Connection Diagram - SR4 HV ; SR4B HV Connection Diagrams for Schematic Codes 2XXXXX
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1429 - FMI 03
3516B Engine for Caterpillar Built Machines Injector Solenoids
950G Series II Wheel Loader, 962G Series II Wheel Loader and IT62G Series II Integrated Toolcarrier Braking System Braking System Troubleshooting
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader MID 081 - CID 1327 - FMI 13
637G Wheel Tractor-Scraper Cooling System Coolant (ELC) - Change
AD30 Underground Articulated Truck Steering System Steering System Pressure - Test and Adjust
AD30 Underground Articulated Truck Steering System Steering Control Valve - Adjust
AD30 Underground Articulated Truck Braking System Pressure Reducing Valve (Pilot Oil) - Test and Adjust
IT38G Series II Integrated Toolcarrier and 938G Series II Wheel Loader MID 081 - CID 1401 - FMI 13
637G Wheel Tractor-Scraper Cooling System Coolant Level - Check
938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Operation Information
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1430 - FMI 04