3304B and 3306B Engines for Caterpillar Built Machines Caterpillar


Automatic Timing Advance - Remove

Usage:

D6D 01Y

拆卸步骤

Table 1
所需工具    
工具     零件号     零件名称     数量    
A     5P-7307     发动机盘车工具     1    
B     0T-0065     螺栓     1    
C     9S-9155     隔套     1    
8S-2264 泵轮拆卸器     2    
0T-0513 螺栓     2    
5P-1075 硬垫圈     2    

开始:

  1. 拆卸前壳体。 请参考解体与组装, "前壳体 - 拆卸"。


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. 按照第 3 和 4 步中的步骤在前盖已拆下时确定燃油喷油泵的正时。 按照第 6 和 7 步中的步骤在前盖已安装时确定燃油喷油泵的正时。

    注: 在全部正时步骤开始时,第 1 缸活塞应位于压缩行程的上止点。

    注: 给出的曲轴旋向是由发动机飞轮端观看而确定的。




    图 1g00474593

  1. 拆下电起动马达并安装工具 (A) 。



    图 2g00474592

  1. 逆时针转动曲轴,直到曲轴齿轮上的 "C" 标记与凸轮轴齿轮上的 "C" 标记对准。



    图 3g00474594

  1. 拆下两个塞子,然后将工具 (B) 安装到飞轮壳上。 大塞孔用于检视。

  1. 要确定 1 缸活塞的压缩行程上止点,使用工具 (A) 顺时针转动飞轮约 30 度。 此步骤应用与消除全部正时齿轮端隙。

  1. 使用工具 (A) 按照发动机旋转的方向逆时针转动飞轮,直到工具 (B) 可被安装到飞轮上。 此时,活塞即处于上止点。

    注: 如果错过了螺栓孔,必须再次开始此步骤。

    注: 从气门室盖上拆下呼吸器组件。 当第 1 缸的进气门和排气门都关闭时,活塞即处于压缩行程的上止点。 必须能够用手上下移动摇臂。




    图 4g00474595

  1. 拆下固定自动正时提前装置的螺栓 (1) 和垫圈 (2) 。


    注意

    为了避免损坏部件,必须在拆卸过程中支撑自动正时提前装置。





    图 5g00474596

  1. 安装螺栓 (1) 并保留 6.35 mm (.250 in) 的间隙。 如图所示,安装工具 (C) 。 拧紧螺柱,以便从燃油喷油泵凸轮轴上的锥体上松开燃油泵驱动齿轮。

  1. 拆下工具 (C) 和螺栓 (1) 。 拆下自动正时提前装置。

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