C3.3B Engines for Caterpillar Built Machines Caterpillar


Camshaft and Valve Lifters - Remove and Install

Usage:

236D BGZ

拆卸步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
磁铁 
390-1149  冲头 

开始:

  1. 拆下摇臂轴和推杆。

  2. 拆下飞轮壳体。

  3. 拆下油底壳。 (仅在拆卸气门挺杆时有必要)

注: 参考技术规格, "发动机设计",了解非指定的发动机扭矩值。


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. 找到 4 号活塞的上止点。 请参阅测试和调整, "找到 4 号活塞上止点"。


    图 1g02795978

  2. 确保惰轮和凸轮轴齿轮上的正时标记 (Y) 对准。 参考图 1。


    图 2g02798975

  3. 使用工具 (A) 支撑住气门挺杆 (1) 以便拆下凸轮轴。


    图 3g02796757


    注意

    拆卸或安装凸轮轴时不要损坏凸轮或轴承。


  4. 拆下螺栓 (3 )。

  5. 小心地从缸体上卸下凸轮轴 (2)。

  6. 拆下工具 (A)。 使用合适的容器在气门挺杆 (1) 滑出缸体底部时盛接气门挺杆 (1)。


    图 4g02880896

  7. 拆下凸轮轴盖 (4)。

安装步骤

  1. 按与拆卸相反的顺序安装凸轮轴 (2)。


      图 5g02881018

    1. 将凸轮轴盖 (4) 置于工具 (B) 上。


      图 6g02881076

    2. 使用工具 (B) 安装凸轮轴盖 (4)。

    3. 拧紧螺栓 (3) 至扭矩为 24 to 27 N·m (212 to 239 lb in)

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