374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Caterpillar


Track (RH) Does Not Travel

Usage:

374F L AP4
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。

表 1
相关部件:     可能原因:     推荐行动:    
阀/管路     右行驶先导控制阀故障     参考故障排除, "行驶先导阀 - 功能测试"    
右行驶先导控制管路故障
右行驶滑阀故障 目视检查主 ACS 阀中的右行驶滑阀。 向左和向右行驶的杆相等。 确认组装在向左和向右行驶孔中的杆组件正确。 (1)    
右行驶马达上的跨接管安全阀故障 参考测试和调整, KENR9615, "安全阀(跨接管)- 测试和调整" (1)    
右行驶马达上的平衡阀故障 检查平衡阀。 参考拆解与组装, UENR0190, "平衡阀(行驶)- 拆卸和安装"    
前泵旁通杆故障 参考故障排除, "旁通阀(ACS 阀)- 功能测试"    
行驶先导软管未连接或有泄漏 执行行驶先导软管的目视检查    
主安全阀故障 参考故障排除, "安全阀(主)- 功能测试"    
暖机阀故障 参考故障排除, "液压系统预热 - 功能测试"    
电子设备/线束/电磁阀     右行驶先导压力传感器故障     请参阅相应的诊断代码故障排除步骤    
驱动泵旁通比例液压调节阀(PHMV)的激活电路对地短路
驱动泵旁通 PHMV 电磁阀故障
软件     直行 PHMV 斜率电流不正确     参考故障排除, "IMV 标定 - 功能测试" (1)    
直行 PHMV 突破电流标定不正确
旁通标定不正确
泵/马达/油箱     物体或碎屑堵在右行驶链轮和履带之间     对右行驶链轮和履带执行目视检查    
油箱中的液压油油位低 请参阅相应的诊断代码故障排除步骤    
后泵未能上升 参考测试和调整, KENR9615, "泵流量测量"    
右行驶停车制动器未能释放 对左行驶停车制动器执行目视检查 (1)    
( 1 ) 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 Speed Is Slow
F Series Excavator Monitoring System Input Components
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Swing Velocity Is Not Smooth
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 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
374F and 390F Excavators and 390F MHPU Mobile Hydraulic Power Unit Boom Up Does Not Function
C280-08 Marine Engine Control Panel
390F Excavator Machine Systems Counterweight - Remove and Install
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