C4.4 Engines for Caterpillar Built Machines Caterpillar


Pistons and Connecting Rods - Disassemble

Usage:

C4.4 2W2

拆解步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
1P-1857  挡圈钳 
1U-6683  活塞环扩张器 

开始:

  1. 拆下活塞和连杆。 请参阅拆解和组装, "活塞和连杆 - 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. 在活塞和连杆组件的部件上作一个临时标记。 这能确保将每个活塞和连杆组件的部件重新安装在原来的气缸中。 标记活塞在活塞销前凸台上的底面。 请勿交换使用部件。


    图 1g01244067


    图 2g01253091
    典型示例

  2. 将活塞和连杆组件连杆朝上地放置在适当的表面上。 使用工具 (A) 拆下卡环 (5)。

    注: 锻造标记 (X) 用于识别连杆组件的前部。 锻造标记应用来定方位。

  3. 将活塞销 (8) 和连杆 (6) 从活塞 (4) 上拆下。

    注: 如果活塞销用手不能拆卸,加热活塞至温度为 45 ± 5 °C (113 ± 9 °F)。 不要使用喷枪加热活塞。 记录连杆和活塞的方位。

  4. 将活塞顶部朝上放在适当的表面上。 使用工具 (B) 将压缩环 (1) 和 (2) 及控油环 (3) 从活塞 (4) 上卸下。

    注: 确定压缩环 (1) 和 (2) 及控油环 (3) 的位置及朝向。



    图 3g01244068

  5. 将螺栓 (12) 和连杆盖 (11) 从连杆 (6) 上拆下。 废弃螺栓。

    注: 放置断面分裂式连杆时必须要安装连杆盖。 在完成活塞和连杆的拆解程序后,应立即进行组装程序和安装程序。 请参阅拆解和组装, "活塞和连杆 - 组装"和拆解和组装, "活塞和连杆 - 安装"。

  6. 从连杆盖 (11) 上拆下连杆轴承 (10) 的下半部分。 从连杆 (6) 上卸下连杆上轴瓦 (9)。 将连杆上下轴瓦放在一起。


    注意

    必须由受过正确培训的人员进行连杆中的活塞销衬套拆卸工作。 还需要使用专用机械设备。 有关更多信息,请咨询授权 Caterpillar 代理商。


  7. 检查连杆有无磨损或损坏。 如有必要,更换连杆 (6) 或更换活塞销的衬套 (7)。

    注: 如果更换连杆或活塞销的衬套,先确定连杆的高度等级。 请参阅技术参数, "连杆"。

  8. 重复步骤 1 至 7,拆解其余的活塞和连杆。

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