3114, 3116 and 3126 Engines Caterpillar


Excessive Valve Lash

Usage:

AP-1000 1HD

可能原因

  • 摇臂调节螺钉锁紧螺母松动

  • 润滑不足

  • 摇臂磨损

  • 推杆磨损

  • 气门挺杆磨损或断裂

  • 凸轮轴磨损

  • 气门杆磨损

  • 气门间隙不正确

修理建议

摇臂调节螺钉锁紧螺母松动

检查摇臂调节螺钉锁紧螺母安装是否正确。 如果摇臂调节螺钉锁紧螺母松动,应调整气门间隙。 请参阅测试与调整, "进排气系统"。

润滑不足

检查气门室的润滑情况。 当发动机高速运转时,应有大量机油流入。 当发动机低速运转时,应只有少量机油流入。 油道必须清洁。 请特别注意向缸盖输油的油道。 检查喷油器挺杆和摇臂压头之间润滑是否充分。

摇臂磨损

检查摇臂有无磨损迹象。 如果磨损过度,应安装新的零件或摇臂。

推杆磨损

检查推杆有无磨损迹象。 如果磨损过度,应安装新的推杆。 调整气门间隙。 请参阅测试与调整, "进排气系统"。

气门挺杆磨损或断裂

清洁气门机构。 安装新气门挺杆。

凸轮轴磨损

检查凸轮轴是否磨损。 调整气门间隙。 请参阅测试与调整, "进排气系统"。 请参阅技术规格以了解磨损限制尺寸。

气门杆磨损

检查气门杆有无磨损迹象。 检查气门是否能自由移动,气门杆是否弯曲。 请参阅技术规格以了解磨损限制尺寸。

气门设定不正确

检查气门间隙。 如有必要,调整气门间隙。 请参阅测试与调整, "进排气系统"。

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