G3500B Engines Caterpillar


Prelubrication Pump Problem

Usage:

G3520B GLF
使用本程序诊断和排除预润滑压力低故障,或者在以下事件代码为激活状态时使用本程序。 关于事件代码的信息,请参阅故障诊断与排除, "事件代码"。 必须进入 Caterpillar 电子技师(ET)上的发动机监控系统才能查看这些代码的当前触发点。 关于发动机监控系统的信息,请参阅故障诊断与排除, "发动机监控系统"。

表 1
事件代码 
说明  激活代码的条件  系统响应 
E233(1) 发动机预润滑压力低  预润滑压力不超过编程延迟时间的触发点。  记录该代码。
防止发动机起动。 

可能原因

  • 供气压力

  • 预润滑泵润滑器

  • 预润滑泵空气马达的排气出口管

  • 发动机机油供给

  • 泵控制电磁阀

  • 预润滑压力开关

  • 预润滑泵

建议的措施

供气压力

检查并确认预润滑泵控制电磁阀上的供气压力充足。 电磁阀接合时检查预润滑泵上的供气压力。 确保空气压力足以运行泵。 检查系统是否泄漏和/或堵塞。

预润滑泵润滑器

检查并确认预润滑泵润滑器充分装满正确的润滑剂。

检查并确认润滑器在预润滑周期中正常工作。

预润滑泵空气马达的排气出口管

检查并确认预润滑泵空气马达的排气出口管未阻塞。

发动机机油供给

检查发动机机油油位。 保持机油油位在油尺的 "ADD"(加注)和 "FULL"(满)标记之间。 检查润滑系统有无泄漏。

如果发动机机油供给正确,查找预润滑泵的油管有无泄漏。 确保发动机机油供给没有阻塞。 根据需要进行修理。

泵控制电磁阀

确保泵控制电磁阀的输出由电子控制模块(ECM)激活。 检查有无与电磁阀相关的诊断代码。 请参考故障诊断与排除, "预润滑 - 测试",以了解与电磁阀电路故障诊断与排除相关的信息。

预润滑压力开关

预润滑泵压力开关必须在 ECM 起动发动机前关闭。 关闭前,开关必须检测到发动机机油油道内 9 ± 3 kPa (1.3 ± 0.4 psi) 的压力。 确保开关正常工作。

预润滑泵

预润滑泵可能有机械故障。 检查预润滑泵。 请参考发动机拆解和组装以了解详情。

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