C4.4 Engines for Caterpillar Built Machines Caterpillar


Rocker Shaft and Pushrod - Install

Usage:

C4.4 2W2

安装步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
227-4389  E10 Torx 套筒 
235-0032  塞尺 


注意

保持所有零件清洁无杂质。

杂质会造成快速磨损和缩短部件寿命。


  1. 清洁气门桥。 检查气门桥有无磨损或损坏。 更换所有损坏或磨损的气门桥。


    图 1g01794035


    图 2g01794053
    气门桥在气门杆上的正确位置如图所示。 为便于显示,没有显示电子单体喷油器。


    注意

    如未能将所有阀桥正确安装至阀杆上,将导致活塞和阀门间产生干扰,从而损坏发动机。


  2. 用清洁的发动机机油润滑气门桥 (4)。 将气门桥安装到缸盖上。

  3. 将气门桥 (4) 安装到缸盖上。 如果阀桥配有罩 (5),确保该罩正确安装。

    注: 将旧气门桥安装在原来的位置和朝向。 确保气门桥正确座入气门。 新气门桥可以安装为任意朝向。

  4. 清洁推杆 (3)。 检查推杆有无磨损或损坏。 更换任何磨损或损坏的推杆。

  5. 使用清洁的发动机机油润滑推杆 (3) 的两端。 将推杆的杯口朝上安装到发动机上。

    注: 确保已将推杆安装到原始位置并且各推杆的球端均已正确安装在阀挺杆中。



    图 3g01476297

  6. 确保摇臂轴组件清洁且无磨损或损坏。 将 torx 螺钉 (1) 安装到摇臂轴上。


    图 4g01794061

  7. 将摇臂轴组件 (2) 安置在缸盖上。 固定夹 (7) 应面向发动机前部。

    注: 确保调节螺钉 (6) 在推杆 (3) 两端正确就座。

  8. 使用工具 (A) 逐步拧紧 torx 螺钉 (1)。

    注: 为了避免摇臂轴组件 (2) 变形,先拧紧中间的 torx 螺钉。 朝着摇臂轴组件外侧进行。

    拧紧 torx 螺钉至扭矩为 35 N·m (26 lb ft)



    图 5g01259267
    典型示例

  9. 使用工具 (B) 检查气门间隙。 如有必要,调整气门间隙。 有关正确的步骤,请参阅系统操作、测试和调整, "发动机气门间隙 - 检查/调整"。

结束:

  1. 安装气门机构盖。 请参阅拆解和组装, "气门机构盖 - 拆卸和安装"。

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