C15 and C18 Engines for Caterpillar Built Machines Caterpillar


Camshaft Gear - Remove and Install

Usage:

826K 232

拆卸步骤

开始:

  1. 拆下前盖。


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。



注意

在拆卸凸轮轴齿轮时,不要转动曲轴或凸轮轴。 如果在安装时没有正确调整前齿轮总成的正时,活塞与气门之间将会发生干涉,进而导致发动机损坏。




    图 1g01010536

  1. 将 1 号活塞安置在压缩冲程的上止点。 请参阅测试和调整, "找到 1 号活塞上止点位置"。

  2. 确认凸轮轴齿轮 (1) 与前壳体 (3) 上的正时标记 (X) 对准。

  3. 拆下螺栓 (2),然后拆下凸轮轴齿轮 (1)。

安装步骤


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。



注意

在拆卸凸轮轴齿轮时,不要转动曲轴或凸轮轴。 如果在安装时没有正确调整前齿轮总成的正时,活塞与气门之间将会发生干涉,进而导致发动机损坏。


  1. 按与拆卸相反的顺序安装凸轮轴齿轮 (1)。


      图 2g02748956

    1. 将螺栓 (2) 拧紧至扭矩为 240 ± 40 N·m (177 ± 30 lb ft)。 使用上述图示顺序拧紧。 将图示标注为 1 和 2 的螺栓再次拧紧至扭矩为 240 ± 40 N·m (177 ± 30 lb ft)

  2. 检查凸轮轴齿轮与可调节惰轮齿轮之间的齿隙。 此齿隙应为 0.356 ± 0.254 mm (0.014 ± 0.010 in)。 参考测试和调整, "齿轮总成(前)- 正时",以了解齿隙调整步骤。

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