C7.1 Industrial Engine and Generator Set Caterpillar


Valve Lash Is Excessive

Usage:

C7.1 770

可能原因

  • 润滑

  • 配气机构部件

建议的措施

润滑

  1. 确保发动机机油压力符合要求。 发动机机油压力低会导致部件过度磨损。

  1. 拆下气门机构盖。 请参考拆解和组装, "气门机构盖 - 拆卸和安装"以了解正确步骤。

  1. 让发动机盘车,检查阀门室中的润滑情况。 确保阀门室中有足够的发动机机油流量。 发动机机油通道必须清洁。

    注: 不要在没有气门机构罩盖的情况下运转发动机。

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。

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