Visual Inspection
目测检查转向系统和部件是确定问题所在的第一步。
Show/hide table
 |
不得用手检查有无渗漏。 针孔（非常细小）渗漏可能会导致软管附近出现高速油流。 这种机油可以穿透皮肤，造成个人伤害。 使用纸板或纸张定位销孔渗漏。 |
- 检查所有油管及连接是否损坏。
- 检查油泵及连接是否有损坏和泄漏现象。
- 沿着油箱和阀门连接的油泵管线进行检查。 检查管线是否有损坏和泄漏现象。
- 检查油箱是否有损坏和泄漏现象。
- 检查油箱油位。
- 当发动机运转时，通过机油取样阀采集油样。 转向电磁安全阀上有一个机油取样阀。 检查油样中是否有气泡。
Show/hide table
 | |
| 图 1 | g00386832 |
机油取样阀的位置 | |
- 拆下滤清器滤芯。 检查是否有滤清器滤芯从机油中过滤出的微粒。 使用磁铁将含铁微粒从不含铁的微粒（活塞环、O 形密封圈或其他密封件）中分离出来。
Caterpillar Information System:
Challenger Agricultural Tractors in Scraper Applications{4150, 7000} Challenger Agricultural Tractors in Scraper Applications{4150, 7000}
793B Off-Highway Truck Steering System Accumulator Charging Valve
416C, 426C, 428C, 436C and 438C Backhoe Loaders Hydraulic and Steering System Bank Valve (Loader Control)
784B and 785B Off-Highway Truck Hydraulic System Hydraulic System Schematic
950G Wheel Loader, 962G Wheel Loader and IT62G Integrated Toolcarrier Power Train Power Train Troubleshooting
583R Pipelayer Power Train Transmission Hydraulic Control
789B Off-Highway Truck Steering System Pressure Switches
3406E, C-10 and C-12 Truck Engines Fuel System Primary Filter - Clean/Replace
950G Wheel Loader, 962G Wheel Loader and IT62G Integrated Toolcarrier Power Train Visual Inspection
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System Pressure Switch (Automatic Retarder)
938G Wheel Loader and IT38G Integrated Toolcarrier Hydraulic System Pilot Valve (Joystick)
583R Pipelayer Power Train Steering and Brake Control Valve
120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H and 16H Motor Graders Caterpillar Monitoring System Action Alarm
789C Off-Highway Truck Steering System Steering System Troubleshooting
789B Off-Highway Truck Steering System Piston Pump (Steering) Flow - Test
768C, 769C, 769D, 772B, 773B, 773D, 776C, 777B, 777D, 784B, 785, 785B, 789, 789B, 793, 793B and 793C Off-Highway Truck/Tractors and 771C, 771D and 775D Quarry Trucks Automatic Retarder Control (ARC) System General Information
793B Off-Highway Truck Electronic Monitoring System (EMS)
120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H and 16H Motor Graders Caterpillar Monitoring System Related Components
784B and 785B Off-Highway Truck Hydraulic System Hydraulic Components and Lines
784B and 785B Off-Highway Truck Hydraulic System Hydraulic Components and Lines
789B Off-Highway Truck Hydraulic System Hydraulic Tank (Torque Converter, Hoist, Brake, and Transmission)
120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H and 16H Motor Graders Caterpillar Monitoring System Glossary of Terms
416C, 426C, 428C, 436C and 438C Backhoe Loaders Hydraulic and Steering System Priority Valve
322B Excavator Hydraulic System General Testing and Adjusting Information