Swing Velocity Is Not Smooth
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) |
| 驱动旁通杆故障 | 参考故障排除, "旁通阀（ACS 阀）- 功能测试" | |
| 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) |
| 横摆角速度传感器故障 | 确认监视器中 "Status（状态）"、"Hybrid System Status（液压系统状态）"、"Swing Speed/Direction（回转速度/方向）"下的回转速度读数。 | |
| 回转端口压力传感器故障 | 请参阅相应的诊断代码故障排除步骤 | |
| 软件 | 左回转比例液压调节阀（PHMV）斜率电流标定不正确 | 参考故障排除, "IMV 标定 - 功能测试" |
| 左回转 PHMV 突破电流标定不正确 | ||
| 右回转 PHMV斜率电流标定不正确 | ||
| 右回转 PHMV 突破电流标定不正确 | ||
| 泵标定不正确 | 参考故障排除, "泵行程 - 功能测试" | |
| 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 | 后泵排量与所需排量不一致 | 参考测试和调整, KENR9615, "泵流量测量" |
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。 |
Caterpillar Information System:
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Swing Does Not Function
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
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
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Boom Up (Single Function) Speed Is Slow