3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Connecting Rod Bearings - Install

Usage:

769C 01X

安装步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
塑料线间隙规 
4C-5593  防粘结剂 


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。




    图 1g00568856
    典型实例

    注: 当间隙检查完成后,安装连杆轴承,并保持干燥。 为了便于最终组装,在连杆轴承上涂抹清洁的发动机机油。

  1. 在连杆轴承盖 (2) 中安装一个新的连杆轴承 (1) 下半部分。

  2. 在连杆内安装新的连杆轴承上半部分。

  3. 拉动曲轴上的连杆。

    注: 请参阅可重复利用零件指南, SEBV0544, "发动机轴承和曲轴",获取关于连杆轴承间隙测量的完整资料。



    图 2g00514587
    典型实例

  4. 使用工具 (A) 检查连杆轴承间隙。 进行间隙检查时,按照步骤 5 和步骤 6 进行正确的连杆轴承盖安装步骤和拧紧步骤。 请参阅拆解与组装, "轴承间隙 – 检查"。

    轴承间隙(新轴承) ... 0.071 至 0.168 mm (0.0028 至 0.0066 in)

    最大容许轴承间隙(旧轴承) ... 0.25 mm (0.010 in)

  5. 使用工具 (B) 润滑连杆螺栓的螺纹和连杆轴承盖 (2) 的座面。 安装连杆轴承盖 (2) 和螺母 (3)。 确保连杆轴承盖一侧的数字和连接杆上的数字在同一侧。

  6. 如下所述,拧紧螺母 (3):

    1. 拧紧螺母至扭矩 82 ± 8 N·m (60 ± 6 lb ft)

    2. 在每个螺母和每个连杆轴承盖上做上标记。

    3. 将各螺母再拧 120 ± 5 度。

  7. 重复步骤 1 至 6 以便安装其余的连杆。

结束:

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

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