C7.1 Industrial Engine and Generator Set Caterpillar


Engine Has Mechanical Noise (Knock)

Usage:

C7.1 770

可能原因

  • 附属设备

  • 配气机构部件

  • 活塞

  • 连杆和主轴承

建议的措施

附属设备

  1. 隔离噪音源。 拆下任何可疑的发动机附件。 检查可疑的发动机附件。 如果发现任何缺陷,请修理和/或更换发动机附件。

  1. 如果机械噪音依然很明显,请参阅"配气机构部件"。

配气机构部件

  1. 检查液压升降机是否正常工作。 请参阅系统操作、测试和调整, "发动机气门间隙 - 检查"。

  1. 检查气门机构的下列部件。 请参阅拆解和装配,了解必须拆下进行检查的所有部件。

    • 摇臂

    • 气门桥

    • 推杆

    • 液压升降机

    • 凸轮轴

    • 气门杆

    • 摇臂轴

  1. 检查内部部件有无下列情况:异常磨损, 过度磨损, 平直 和 清洁。 如有必要,换上新的零部件。

    注: 如果更换凸轮轴,则也必须使用新的气门挺杆。

  1. 如果机械噪音依然很明显,请参阅"活塞"。

活塞

  1. 检查活塞有无损坏和磨损。 更换所有损坏的零件。

  1. 如果机械噪声仍然很明显,请参阅"连杆和主轴承"。

连杆和主轴承

检查连接杆和主轴承。 此外,请检查曲轴轴承表面(轴颈) 更换所有损坏的零件。

如果故障仍然很明显,请参阅故障诊断与排除, "气缸有噪音"。

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