3516C Generator Set Engines Caterpillar


Prelubrication Pump Problem

Usage:

3516C LY6
使用本步骤诊断和排除预润滑机油压力低故障,或者在以下事件代码为现行状态时使用本步骤。

表 1
事件代码    
J1939 代码和说明     产生此代码的状况     系统响应    
3551-17 发动机起动受限,预润滑系统问题     在编程的持续时间内,电子控制模块没有检测到发动机预润滑顺序的最低压力。     记录该代码。    

可能原因

  • 发动机机油油位

  • 预润滑马达的电源

  • 预润滑压力不足

建议的措施

发动机机油油位

检查发动机机油油位。 参考操作和保养手册以了解详情。 如有必要,向发动机添加发动机机油。 检查润滑系统有无泄漏。

预润滑马达的电源

确保预润滑泵接线正确。

将 Cat 电子技师连接到维修工具接头上。 检查有无与发动机预润滑泵相关的现行诊断代码和记录的诊断代码。 在继续工作之前,对所有为现行或记录状态的代码进行故障诊断与排除。 请参考故障诊断与排除, "预润滑 - 测试"以了解与泵电路相关的信息。

预润滑压力不足

在发动机预润滑循环过程中,使用 Cat ET 监控机油滤清器之后的发动机机油压力。 在拖动发动机之前,ECM 必须在编程的 "Engine Prelube Duration(发动机预润滑持续时间)"内检测到 20 kPa (3 psi) 的机油压力。 如果在循环过程中,该泵无法在编程的持续时间内建立正确的压力,则预润滑泵可能存在故障。 修理或更换泵。

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