3524B Engines for Off-Highway Trucks Caterpillar


Mechanical Noise (Knock) in Engine

Usage:

3524B 1AW

可能的原因

  • 附件有故障

  • 气门系部件损坏

  • 连杆轴承故障

  • 曲轴轴承

建议措施

附件有故障

找出噪音源。 拆下可能有问题的发动机附件。 检查可能有问题的发动机附件。 修理和/或更换发动机附件。

气门系部件损坏

从可能有问题的气缸上卸下气门盖。 检查以下部件有无损坏: 凸轮轴, 气门转子线圈, 气门弹簧, 挺杆, 推杆, 气门桥 和 喷油器. 检查有无不灵活的气门。 拆下缸盖,检查气门。 更换所有损坏的零件。 如果出现零件损坏,请清洁以下部件: 缸套, 活塞 和 排气系统. 更换所有损坏的零件。

连杆轴承故障

检查连杆轴承和曲轴上的轴承表面(轴颈)。 检查活塞销有无过度磨损。 更换所有损坏的零件。

曲轴轴承

检查曲轴和/或曲轴轴承。 检查各零部件有无过度磨损。

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