C7.1 (Mech) Industrial Engine Caterpillar


Cylinder Head - Inspect

Usage:

C7.1 630

  • 从发动机上拆下缸盖。

  • 拆下水温调节器壳体。

  • 检查缸盖有无气体或冷却液泄漏的迹象。

  • 拆下气门弹簧和气门。

  • 彻底清洁缸盖底面。 清洁冷却液水道和润滑油油道。 确保缸盖与缸体的接触面清洁、光滑和平整。

  • 检查缸盖底面有无穴蚀、腐蚀和裂纹。 检查气门座镶圈和喷油器喷嘴孔周围的区域。

  • 200 kPa (29 psi) 的压力下测试缸盖是否泄漏。


    图 1g02260053
    缸盖平面度(典型示例)
    (A) 边到边
    (B) 端到端
    (C) 对角线

  • 测量缸盖的平面度。 使用直尺和塞尺检查缸盖的平面度。

    • 从一侧至相对一侧 (A) 测量缸盖。

    • 从一端至相对一端 (B) 测量缸盖。

    • 从一角至相对一角 (C) 测量缸盖。

    请参考技术规格, "缸盖"以了解平面度要求。

    重修缸盖表面

    如果发生下述任何一种情况,可以重修缸盖底面。

    • 缸盖底面平面度不符合技术规格。

    • 缸盖底面因穴蚀、腐蚀或磨损而引起损坏。

    注: 缸盖机加工后,缸盖厚度不得小于 118 mm (4.64566 in)

    注: 在重修缸盖表面后,气门座至火焰面的尺寸必须正确。 请参考技术规格, "缸盖"以了解正确的气门座尺寸。

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