C7.1 Engines for Caterpillar Built Machines Caterpillar


Valve Depth - Inspect

Usage:

525D 2L5

表 1
所需工具 
工具  零件号  零件描述  数量 
A  8T-0455  缸套凸出量工具总成 


图 1g01343897
(1) 千分表
(2) 仪表体
(3) 仪表块

  1. 使用工具 (A) 检查进气门和排气门低于缸盖表面的深度。 使用仪表支座 (3) 将千分表 (1) 归零。

  2. 确保气门的表面清洁。 确保气缸的底面清洁。 确保缸盖没有扭曲。 有关测量缸盖平面度的步骤,请参考系统操作、测试和调整, "缸盖 - 检查"。


    图 2g01343900
    典型实例
    气门深度的测量
    (1) 千分表
    (2) 仪表体

  3. 定位仪表体 (2) 和千分表 (1) 以测量气门深度。 在拆卸气门弹簧之前测量进气门和排气门的深度。

  4. 有关新发动机的进气门和排气门最小和最大极限值,请参考技术规格, "缸盖"。

  5. 在运转过的发动机上会出现工作磨损。 如果使用过的发动机上的气门低于缸盖表面的深度超过工作磨损的技术规格,则必须更换以下部件。

    • 气门

    • 气门镶圈

    有关进气门和排气门的磨损极限,请参考技术规格, "缸盖"。

  6. 检查每个气门有无裂纹。 检查气门杆有无磨损。 确保气门正确地安装在气门导管中。 有关检查气门导管的步骤,请参考系统操作、测试和调整, "气门导管 - 检查"。

  7. 检查气门弹簧上的负载。 有关气门弹簧的正确长度和技术规格,请参考技术规格, "缸盖气门"。

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