Boom Down (Single Function) Speed Is Slow
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。
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相关部件:     | 可能原因:     | 推荐行动:     |
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阀/管路     | 动臂沉降阻尼阀(DRV)提升阀故障     | 参考故障排除, "沉降阻尼阀 - 功能测试"     |
惰轮旁通滑阀故障 | 参考故障排除, "旁通阀(ACS 阀)- 功能测试"     | |
动臂泵至油缸连杆端(PCRE)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)     |
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动臂泵至油缸缸盖端(PCHE)滑阀故障 | ||
动臂油缸至油箱缸盖端(CTHE)滑阀故障 | ||
先导压力低 | 参考测试和调整, KENR9615, "安全阀(先导)- 测试和调整"     | |
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"     | |
电子设备/线束/电磁阀     | 动臂/铲斗操纵手柄故障     | 参考故障排除, "操纵手柄 - 功能测试" (1)     |
惰轮旁通比例液压调节阀(PHMV)故障 | 参考故障排除, "旁通阀(ACS 阀)- 功能测试"     | |
动臂 PCRE PHMV 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)     |
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动臂 PCHE PHMV 故障 | ||
动臂 CTHE PHMV 故障 | ||
动臂下降单向阀(BLCV)故障 | 请参阅相应的诊断代码故障排除步骤     | |
ECM 故障。 ECM 不太可能有故障 | 更换 ECM 之前,务必向代理商的技术通信员征求 Caterpillar 可能的意见。 此咨询可能影响修理时间。 遵循故障诊断与排除, "ECM - 更换"中的步骤,以便更换 ECM     | |
软件     | 动臂 PCRE PHMV 斜率电流不正确     | 参考故障排除, "IMV 标定 - 功能测试"     |
动臂 PCHE PHMV 斜率电流不正确 | ||
动臂 CTHE PHMV 斜率电流不正确 | ||
动臂 PCRE PHMV 突破电流不正确 | ||
动臂 PCHE PHMV 突破电流不正确 | ||
动臂 CTHE PHMV 突破电流不正确 | ||
发动机     | 发动机转速低     | 参考故障排除, "液压功率 - 功能测试"     |
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( 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:
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