3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Crankshaft Main Bearings - Remove

Usage:

769C 01X

拆卸步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
A  2P-5518  轴承工具 

开始:

  1. 拆卸发动机机油泵。 请参阅拆解和组装, "发动机机油泵 - 拆卸"。


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。


  1. 检查主轴承盖,确认其在缸体中的位置和方向是否正确。 主轴承盖安装时必须和拆卸之前的方向保持一致。


    图 1g00503084
    典型实例

  2. 使用适当的步骤拆卸主轴承盖。

    3412E

    拆下第 2 号到第 6 号主轴承盖 (1)。 从第 4 号主轴承上拆下止推片。

    在安装第 2 号到第 6 号主轴承盖后,拆下第 1 号和第 7 号主轴承盖。

    3408E

    拆下第 2 号到第 4 号主轴承盖 (1)。 从第 3 号主轴承上拆下止推片。

    在安装第 2 号到第 4 号主轴承盖后,拆下第 1 号和第 5 号主轴承盖。



    图 2g00503174

    注: 如果曲轴转动方向错误,那么就会把轴承上的凸舌推到曲轴和缸体轴承区域之间。 这样会导致缸体和 / 或曲轴的损坏。

  3. 将工具 (A) 放入曲轴中的机油孔 (2) 中,以拆下主轴承的上半部分。 沿将拆下主轴承上半部分的方向转动曲轴。

  4. 从主轴承盖上拆下主轴承的下半部分。

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