3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Camshaft Bearings - Install

Usage:

769C 01X

安装步骤

表 1
所需工具 
工具  零件号  零件说明  数量 
A  8S-2241  凸轮轴轴承工具总成 
8S-8293 伸出 
5P-1667 管 


注意

保持所有零件清洁无杂质。

杂质会造成快速磨损並縮短部件使用寿命。


    注: 确保缸体内部清洁。 检查凸轮轴孔上有无毛刺。 安装前,在凸轮轴轴承孔内表面和每个凸轮轴轴承上涂抹薄薄的一层干净的机油。

    注: 共采用两种不同的凸轮轴轴承。 将宽凸轮轴轴承安装到前后凸轮轴孔内。 将窄凸轮轴轴承安装到内孔中。



    图 1g00570127

  1. 利用工具 (A) 安装所有凸轮轴轴承,使凸轮轴轴承内的机油孔处于水平位置。 安装角度 (1) 为 90 ± 15 度。

  2. 利用工具 (A) 将凸轮轴轴承安装到发动机的前端。 从每个孔的后部开始安装轴承。 利用工具 (A) 将轴承拉入孔中。 采用以下程序获得轴承的正确安装深度。


      图 2g00583232

    1. 安装后凸轮轴轴承。 将轴承拉入孔中,直到轴承的前端面与孔 (2) 的前端面齐平为止。

    2. 安装窄内部凸轮轴轴承。 从发动机的尾端开始依次向前安装轴承。 将每个轴承拉入孔中,直到轴承的前端面与孔的前端面齐平为止。


      图 3g00569930
      测量前凸轮轴轴承的深度。

    3. 利用工具 (A) 将前凸轮轴轴承安装到规定的深度。 从缸体的前端测量深度。

      正确安装深度的前凸轮轴轴承应当距离发动机缸体前端面 4.6 ± 0.5 mm (0.18 ± 0.02 in)

注: 关于其余凸轮轴轴承安装深度的更多信息,请参阅技术参数, "凸轮轴轴承"。

结束:

  1. 安装凸轮轴。 请参阅拆解和组装, "凸轮轴 - 安装"。

  2. 安装飞轮壳。 请参阅拆解和组装, "飞轮壳体 - 拆卸和安装"。

  3. 安装活塞和连杆。 请参阅拆解和组装, "活塞和连杆 - 安装"。

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