C4.4 (Mech) Industrial Engine Caterpillar


Valve Guide - Inspect

Usage:

C4.4 2L2

简介

此步骤旨在给出有关检查气门导管的信息。

进行该项检查是为了确定是否需要更换气门导管。

所需工具

表 1
所需工具    
零件号     零件名称     数量    
8T-5096     千分表总成     1    

检查程序




图 1g00986821

(1) 气门导管

(2) 气门在气门导管中的径向移动

(3) 阀杆

(4) 千分表

(5) 气门头

  1. 将新气门放入气门导管内。

  1. 将千分表和磁性座置于缸盖表面。

  1. 升起气门头边缘,直至距离为 15.0 mm (0.60 in)。

  1. 径向移动气门,使其远离千分表。 确保气门尽量远离千分表。 将千分表接触点定位到气门头边缘。 将千分表指针位置归零。

  1. 径向移动气门,使其尽可能靠近千分表。 记录千分表上指示的移动距离。 如果此距离大于气门在气门导管中的最大间隙,则需更换气门导管。

  1. 当安装新气门导管时,必须安装新气门和新气门座镶圈。 气门导管和气门座镶圈是以粗加工零件的形式供应的。 将粗加工的气门导管和粗加工的气门座镶圈安装在缸盖中。 然后,使用专用工具将气门导管和气门镶圈一次性切削并铰孔成形

  1. 有关气门在气门导管中的最大间隙,请参阅技术规格, "缸盖气门"。

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