3046 Engine for Caterpillar Built Machines Caterpillar


Piston Height - Inspect

Usage:

D4C III 1FW

简介

如果活塞高于缸体顶面的高度不符合技术规格, "活塞和活塞环"中给出的公差,必须更换活塞和活塞销轴承。 如果更换或重新机加工过以下任一部件,则必须测量活塞高于缸体顶面的高度:

  • 曲轴

  • 缸盖

  • 连杆

  • 活塞销轴承

  • 活塞

必须保持适当的活塞高度才能确保发动机符合排放标准的要求。

注: 活塞顶部不应进行机加工。 如果安装的是原来的活塞,确保将原来的活塞组装到正确的连杆上并安装到原来的气缸中。

所需工具

表 1
所需工具    
零件号     零件名称     数量    
8T-0455     缸套凸出量工具总成     1    

检查步骤




    图 1g00323908

    8T-0455 缸套凸出量工具总成

    (1) 1P-2403 千分表

    (2) 1P-2402 量规体

    (3) 1P-5507 仪表块

  1. 使用 8T-0455 缸套凸出量工具总成 测量活塞高于缸体顶面的高度。 使用仪表块 (3) 将千分表 (1) 归零。



    图 2g00326383

    活塞高度测量

    (1) 1P-2403 千分表

    (2) 1P-2402 量规体

  1. 定位量规体 (2) 和千分表 (1) 以便测量活塞高于缸体顶面的高度。 缓慢地转动曲轴,确定活塞处在最高位置的时刻。 记录该尺寸。 将该尺寸与技术规格, "活塞和活塞环"中给出的尺寸进行比较。

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