C3.3B and C3.8 Engines for Caterpillar Built Machines Caterpillar


Coolant Contains Oil

Usage:

299D3XHP AN9

可能原因

  • 发动机油冷却器

  • 缸盖衬垫

  • 缸盖

  • 缸体

下面以概率的先后顺序列出了这些步骤。 依次完成这些步骤。

利用定期机油取样确认冷却液内是否有机油存在。 确认必须在执行以下步骤前完成。

建议的措施

表 1
故障诊断与排除测试步骤  数值  结果 

1. 发动机机油冷却器泄漏

A. 检查发动机机油冷却器是否泄漏。 关于正确的步骤,参考测试和调整。
 

机油冷却器
 

结果:在发动机机油冷却器内发现泄漏。

安装新的机油冷却器芯。 参考拆解和装配手册。

冲洗冷却系统。 有关正确的冲洗步骤,参考操作和保养手册。 在冷却系统中重新加注适当的冷却液。 有关正确的冷却液和容量,参考操作和保养手册。

检查机油中有无冷却液。 如果在机油中发现冷却液,则排空曲轴箱。 泄漏修复后,在曲轴箱中重新加注适当的机油。 有关正确的机油容量和粘度,参考操作和保养手册。

结果:在发动机机油冷却器内没有发现泄漏。

转至测试步骤 2。
 

2. 缸盖衬垫

A. 拆下缸盖。 参考拆解和装配手册。


B. 安装一个新的缸盖衬垫。 参考拆解和装配手册。
 

缸盖衬垫
 

结果:安装了新缸盖密封垫和水封。

继续测试步骤 4。
 

3. 缸盖

A. 检查缸盖中有无裂纹。 对缸盖执行泄漏测试。 关于检查缸盖的正确步骤,请参阅系统操作、测试和调整。
 

缸盖
 

结果:在缸盖内发现裂纹。

修理和/或更换缸盖。 参考拆解和装配手册。

结果:在缸盖内没有发现裂纹。

继续测试步骤 5。
 

4. 缸体

A. 检查缸体有无裂纹。
 

缸体
 
结果:在缸体内发现裂纹。

修理或更换缸体。 检查顶部平台。 有关正确的检查步骤,参考再使用和修补指南。
 

如果以上步骤未解决问题,请联系当地 Cat 代理商的技术通信员(TC)。 如需进一步的帮助,您的 TC 可以通过代理商解决方案网络(DSN)与您交谈。

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