C175-16 Locomotive Engine Caterpillar


Prelubrication Pump Problem

Usage:

C175-16 3A9
使用此步骤对低预润滑机油压力进行故障诊断与排除。 此外,如果下列事件代码激活,使用此步骤。

表 1
事件代码 
CDL 代码和描述  产生此代码的状况  系统响应 
E233(3) 发动机预润滑压力低  在编程的持续时间内,电子控制模块 (ECM) 没有检测到发动机预润滑顺序的最低压力。  记录该代码。
发动机将无法起动。 

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

注: 下面以概率的先后顺序列出了这些步骤。 按所列测试步骤中的顺序完成这些步骤。

表 2
故障诊断与排除测试步骤  数值  结果 

1. 检查代码

A. 将 Caterpillar 电子技师(ET)连接到维修工具接头上。 如有必要,请参阅故障诊断与排除, "电子维修工具"。

B. 在执行任何故障诊断与排除或清除故障诊断代码前,从发动机 ECM 下载"产品状态报告"。

C. 确定指向此描述的事件代码是否存在。

D. 针对指向此描述的事件代码,检查有无系统相关的激活诊断代码。
 

E233
 

结果:存在相关代码。

修理:在继续进行此测试前,诊断并排除所有相关代码。

结果:存在 E233 代码。

转至下一步。

结果:没有激活的代码

停止
 

2. 检查发动机机油油位
 

液位
 

结果:机油油位不低。

转至下一步。

结果:机油油位低。

修理:加注机油以获得正确的机油油位。
有关发动机机油的建议,参考操作和保养手册, "发动机机油"。

起动发动机。 检查发动机外部是否漏油。 修理漏油处。

如果故障未得到排除,转至下一步骤。
 

3. 检查预润滑泵电机的电源

A. 确保预润滑泵接线正确。
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。
 

功率
 

结果:泵在需要时通电。

转至下一步。

结果:泵在需要时未通电。

修理:修理或更换有故障的电路部件。

如果故障未得到排除,转至下一步骤。
 

4. 检查预润滑压力是否不足

A. 预润滑循环期间,监视下述参数:
"发动机机油压力(绝对)"

注:拖动发动机前,ECM 在编程设定的 "Engine Ready to Start Prelube Duration(发动机准备起动预润滑持续时间)"内必须检测到 41 kPa (6 psi) 的机油压力。
 

压力
 

结果:压力不正常

修理:修理或更换泵。
 

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