Mechanical Noise (Knock) in Engine
- 驱动设备
- 气缸盖和相关的部件
- 齿轮系
- 曲轴和相关的部件
- 活塞
检查被驱动设备的对中和平衡。 检查联轴器。 必要时，分离被驱动设备，然后再测试发动机。
检查气门机构零部件状态是否良好。 检查气门、气缸盖密封垫等有无损坏和/或过度磨损迹象。检查曲轴的状态。 如果更换凸轮轴，必须安装新的气门挺杆。
检查齿轮系的状况。
检查发动机机油滤清器有无非铁质材料。 非铁质碎屑可能表明齿轮系轴承磨损。
检查曲轴和相关部件。 检查曲轴上的连杆轴承和轴承表面。 确保轴承处于正确位置。
查找止推片和曲轴有无磨损。
检查配重螺栓。
确保活塞销安装正确。
按照再用零件和修复操作指导原则来检查活塞状况。
Caterpillar Information System:
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