C4.4 Industrial Engine Caterpillar


Idler Gear - Remove

Usage:

C4.4 444

拆卸步骤(早期重负荷惰轮)

表 1
所需工具 
工具  零件号  零件描述  数量 
230-6284  定时销(凸轮轴)  
230-6283  定时销(曲轴) 

开始:

  1. 如果发动机配备空气压缩机,则卸下该空气压缩机。 请参阅拆解和组装 , "空气压缩机 - 拆卸和安装" 。

  2. 如果发动机配备真空泵,则卸下该真空泵。 请参阅拆解和组装真空泵 - 拆卸和, "安装" 。

  3. 如果发动机配备附件驱动,则卸下该附件驱动。 请参阅拆解 , "和组装附件驱动 - 拆卸和安装" 。

  4. 卸下喷油泵齿轮。 请参阅拆解和组装燃油泵齿轮 -, "拆卸" 。

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

注: 必须小心操作,确保在燃油泵齿轮的拆卸过程中喷油泵定时不会丢失。 小心地遵循本步骤以卸下燃油泵齿轮。


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: 重负荷惰轮不可维修。 不要拆解重负荷惰轮。

  1. 确保 1 号活塞在压缩冲程的上死点位置。 请参阅系统 , "操作、测试和调整确定 1 号活塞上止点位置" 。


    图 1g01473492
    定时标记的对齐

  2. 确保已将工具 (A) 安装在凸轮轴齿轮 ( 1) 的孔 (X) 中。 使用工具 (A),将凸轮轴锁定到位。

    注: 确保标记齿轮,以便显示对齐位置。

  3. 确保已将工具 (B) 安装在前壳体的孔 ( Y) 中。 使用工具 (B),将曲轴锁定到位。


    图 2g01473493
    典型实例

  4. 拧松所有摇臂 (5) 上的螺母 ( 4)。 拧松所有摇臂 ( 5) 上的调节器 (3),直到所有阀门完全闭合。

    注: 如果不能保证完全拧松所有调节器,可能会导致阀门与活塞接触。



    图 3g01473532
    典型实例


    图 4g01473495
    典型实例

  5. 从重负荷惰轮组件 ( 6)上卸下螺栓 (7)。

  6. 从前壳体的凹槽上卸下惰轮组件 ( 6)。

    注: 在拆卸过程中惰轮必须保持倾斜。

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