C4.4 and C7.1 Engines Caterpillar


Exhaust System Contains Oil

Usage:

525D 2L5

可能原因

  • 过长怠速时间

  • 涡轮增压器密封件损坏

  • 气门导管密封件磨损或损坏

  • 气门导管磨损

  • 活塞环磨损

按所列步骤顺序完成以上步骤。

表 1
故障诊断与排除测试步骤  数值  结果 

1. 过长怠速时间

A. 过长怠速时间会使机油进入排气系统中。
 

怠速时间
 

结果 怠速时间过长。

修理:减少怠速时间。

结果:怠速时间没有过长。

转至测试步骤 2。
 

2. 涡轮增压器密封件损坏

A. 检查进气歧管和排气歧管中有无机油。
 

涡轮密封件
 

结果:进气或排气歧管中有机油。

修理:更换涡轮增压器。 确认修理。

结果:进气或排气歧管中没有机油。

转至测试步骤 3。
 

3. 气门导管密封件磨损或损坏

A. 检查气门导管密封件有无磨损或损坏。
 

气门导管密封件
 

结果:气门导管密封件损坏。

修理:更换气门导管密封件。 确认修理。

结果:气门导管密封件未损坏。

继续测试步骤 4。
 

4. 气门导管磨损

A. 检查气门导管有无磨损。 关于气门导管的最大允许磨损量,请参阅技术规格手册。
 

气门导管
 

结果:气门导管磨损。

修理:必要时,修复缸盖。 确认修理。

结果:气门导管未磨损。

继续测试步骤 5。
 

5. 活塞环磨损

A. 拆下活塞。 请参阅拆解和组装, "活塞和连杆 - 拆卸"。

B. 从活塞上拆下活塞环。 请参阅拆解和装配, "活塞和连杆 - 拆解"。

C. 检查活塞和活塞环有无磨损或损坏。 更多相关资料,请参阅"技术规格"手册。
 

活塞环
 

结果 活塞环磨损。

修理:更换活塞环。 确认修理。

结果 活塞环未磨损。

请联系代理商解决方案网络 (DSN)。
 

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