C15 and C18 Engines for Caterpillar Built Machines Caterpillar


Connecting Rod Bearings - Remove and Install

Usage:

826K 232

拆卸步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
9S-9082  发动机盘车工具 
8T-3052  度数轮 

开始:

  1. 拆下发动机机油泵。


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。




    图 1g00998459

  1. 用工具 (A) 转动曲轴,直到连杆位于底部中央位置。

  2. 检查连杆和连杆盖上的识别标记是否正确。 连杆和连杆盖侧面应该有蚀刻的编号。 该编号必须与气缸号一致。 如有必要,标记连杆和连杆盖。

    注: 请勿压印连杆组件。 在连杆组件上压印或冲孔会导致连杆断裂。

  3. 从连杆上拆下螺栓 (1) 和连杆轴承盖 (2)。

  4. 从连杆轴承盖上拆下连杆轴承下半部分。

  5. 将连杆推离曲轴。 从连杆上拆下连杆轴承上轴瓦。

安装步骤


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: 当间隙检查完成后,安装连杆轴承,并保持干燥。 请参阅拆解与组装, "轴承间隙 – 检查"。 为了便于最终组装,在连杆轴承上涂抹清洁的发动机机油。



    图 2g00998730

  1. 使用工具 (A) 转动曲轴直到连杆轴颈位于底部中央位置。

  2. 将新的连杆轴承 (3) 下轴瓦安装到连杆轴承盖 (2) 中。

    注: 确保轴承锁舌 (4) 位于连杆轴承盖的凹槽中。

  3. 在连杆内安装新的连杆轴承上半部分。

    注: 确保轴承锁舌位于连杆的槽口中。

  4. 将连杆拉到曲轴上。


    图 3g01016640

  5. 将连杆轴承盖 (2) 安置在连杆上。

    注: 确保连杆轴承盖一侧的数字和连接杆上的数字在同一侧。 连杆轴承盖及连杆上的轴承凸舌都位于活塞冷却喷嘴侧。

  6. 使用清洁的发动机机油润滑螺栓 (1) 的螺纹。 安装螺栓。

  7. 按照以下步骤拧紧螺栓 (1):

    1. 拧紧螺栓 (A) 和螺栓 (C) 至扭矩为 70 ± 4 N·m (52 ± 3 lb ft)

    2. 拧紧螺栓 (B) 和螺栓 (D) 至扭矩为 70 ± 4 N·m (52 ± 3 lb ft)

    3. 将螺栓 (B) 和 (D) 再次旋转 60 ± 5 度(1/6 圈)。

      注: 如果没有使用工具 (B),则应在每个螺栓上加索引标记。

    4. 再拧紧螺栓 (A) 和螺栓 (C) 至扭矩为 70 ± 4 N·m (52 ± 3 lb ft)

    5. 再拧紧螺栓 (A) 和螺栓 (C) 60 ± 5 度(1/6 圈)。

      注: 如果没有使用工具 (B),则应在每个螺栓上加索引标记。

    6. 转动曲轴,以便确保曲轴能转动自如。

结束:

  1. 安装发动机机油泵。

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