Swing Does Not Function
注: 开始任何故障排除步骤前，参考故障排除, "故障排除症状"。 使用 Cat® 电子技师（Cat ET）维修工具或机器监视器检查有无现行诊断代码。 如果存在诊断代码，请参阅相应的诊断代码故障排除步骤排除此故障然后再继续下一步。
Show/hide table
| 相关部件： | 可能原因： | 推荐行动： |
|---|---|---|
| 阀/管路 | 回转制动器电磁阀和回转制动器之间的先导管路泄漏 | 参考故障排除, "回转制动器 - 功能测试" |
| 至回转制动器电磁阀的先导压力低 | ||
| 回转马达至油箱（MT）独立计量阀（IMV）滑阀故障 | 参考故障排除, "IMV 标定 - 功能测试" (1) 参考故障排除, "IMV 控制性能故障排除。" (2) |
|
| 回转泵至马达（PM）IMV 滑阀故障 | ||
| 主安全阀出故障 | 参考故障排除, "安全阀（主）- 功能测试" | |
| 先导安全阀故障 | 参考测试和调整, KENR9615, "安全阀（先导）- 测试和调整" (2) | |
| 电子设备/线束/电磁阀 | 斗杆/回转操纵手柄故障 | 参考故障排除, "操纵手柄 - 功能测试" (1) |
| 回转制动器电磁阀的激活电路对地短路 (3) | 参考故障排除, "回转制动器 - 功能测试" | |
| 左回转比例液压调节阀（PHMV）的激活电路对地短路 (3) | 参考故障排除, "IMV 标定 - 功能测试" (1) 参考故障排除, "IMV 控制性能故障排除。" (2) |
|
| 右回转 PHMV 的激活电路对地短路 (3) | 参考故障排除, "IMV 标定 - 功能测试" (1) 参考故障排除, "IMV 控制性能故障排除。" (2) |
|
| 驱动泵旁通 PHMV 的激活电路对地短路 (3) | 参考故障排除, "旁通阀（ACS 阀）- 功能测试" | |
| 回转滑阀 PHMV 电磁阀故障 (3) | 参考故障排除, "IMV 标定 - 功能测试" (1) 参考故障排除, "IMV 控制性能故障排除。" (2) |
|
| 驱动泵旁通 PHMV 电磁阀故障 (3) | 参考故障排除, "旁通阀（ACS 阀）- 功能测试" | |
| 相关软件 | 斜率电流值为 0mm/A 或接近 0mm/A | 参考故障排除, "IMV 标定 - 功能测试" |
| 突破电流标定值为 0mA 或接近 0mA | ||
| 泵/马达/油箱 | 后泵未能上升 | 参考测试和调整, KENR9615, "泵流量测量" |
| 后泵故障 | ||
| 回转马达故障 | 参考测试和调整, KENR9615, "回转马达 - 测试 - 箱体排油的测量值" (2) | |
| 油箱中的液压油油位低 | 检查相关的诊断代码 |
Show/hide table
| ( 1 ) | 指示在故障排除顺序中应第一个完成的动作。 |
| ( 2 ) | 指示在故障排除过程中应作为最终选项考虑的功能测试。 |
| ( 3 ) | 请参阅相应的诊断代码故障排除步骤。 |
Caterpillar Information System:
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Bypass Valve (ACS Valve) - Functional Test
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit IMV Calibration - Functional Test
C15 and C18 Petrolem Generator Set Engines Fuel Filter Is Restricted
C15 and C18 Petrolem Generator Set Engines Variable Valve Actuator - Test
2014/01/31 A New Valve Guide Is Used on Certain C18 Marine Engines {1100, 1101}
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Hydraulic Power - Functional Test
C4.4 Marine Generator Set Electronic Service Tools
C280-08 Tier 4 Engine Catalyst - Remove and Install
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Straight Travel - Functional Test
C4.4 Marine Generator Set Glossary
C280-08 Marine Engine Engine Stopping
C280-08 Marine Engine Engine Starting
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Swing Velocity Is Not Smooth
F Series Excavator Monitoring System Input Components
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Swing Speed Is Slow
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Track (RH) Does Not Travel
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Track (LH) Does Not Travel
C15 and C18 Petrolem Generator Set Engines Variable Valve Actuator Response - Test
Procedure to Flash the ADEM 3 Engine Electronic Control Gp {1901, 1920} Procedure to Flash the ADEM 3 Engine Electronic Control Gp {1901, 1920}
C4.4 Marine Generator Set Indicator Lamps
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Travel Speed Is Slow
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Implement Operation Is Uncontrollable During Travel
C15 and C18 Petrolem Generator Set Engines Solenoid Valve - Test
C280-08 Marine Engine Reference Information