3176C and 3196 Engines For Caterpillar Built Machines Caterpillar


Crankshaft Main Bearings - Install

Usage:

140H 126

安装步骤

表 1
所需工具    
工具     零件号     零件描述     数量    
A     2P-5518     轴承工具     1    
B     8T-5096     千分表总成     1    
C     6V-4876     润滑     -    


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: 组装之前,在曲轴主轴承上涂上清洁的发动机机油。 确保曲轴主轴承背面的锁键适合曲轴主轴承盖和缸体的凹槽。


注意

确保曲轴主轴安装在正确的位置。 使用两个零件号不同的零件,数量分别是3个和 4 个。 4个具有相同零件号的零件应安装到曲轴主轴承 2、3、5 和 6 上。 3个具有相同零件号的零件应安装到曲轴主轴承 1、4 和 7 上。 止推板仅安装在中间曲轴主轴承上。





    图 1g01022781

  1. 将止推片 (4) 安装到凸轮轴上。

  1. 使用工具 (A) 将曲轴主轴承 (3) 新的上轴瓦安装到缸体内。 轴承的这一半有油孔。 不要用机油涂抹曲轴主轴承背面。



    图 2g01022767

  1. 在曲轴主轴承盖 (2) 中安装曲轴主轴承的新下半部分。 不要用机油涂抹曲轴主轴承背面。


    注意

    安装曲轴主轴盖 时,应使零件号朝向发动机右侧。 曲轴主轴盖通过位于底部表面的冲压号码 1 到 7 进行识别。 止推板安装在曲轴主轴承上的原始位置中。


  1. 在缸体上安放主轴承盖 (2) 到位。 将清洁的发动机机油或工具 (C) 涂抹到螺栓螺纹和垫圈表面。 安装螺栓 (1) 。

  1. 将螺栓上紧到 95 ± 5 N·m (70 ± 4 lb ft) 的扭矩。 在每个螺栓头上标上标记。 将每个螺栓都再拧紧90 ± 5度(1/4圈)。

  1. 用工具 (B) 检查曲轴端隙。 端隙必须为 0.10 mm (0.004 in) 到 0.50 mm (0.020 in)。

    注: 曲轴端隙由曲轴止推板 (4) 控制。 止推板 (4) 位于曲轴的中间。

End By: 安装油底壳。 请参阅 拆解和组装, "发动机油底壳 - 拆卸和安装"。

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