C3.3B Engines for Caterpillar Built Machines Caterpillar


Pistons and Connecting Rods - Assemble

Usage:

236D BGZ

组装步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
1U-6683  活塞环扩张器 
393-2569  轴承安装工具 

注: 参考技术规格, "发动机设计",了解非指定的发动机扭矩值。

  1. 确保所有部件清洁、无磨损或损坏。 如有必要,更换所有磨损或损坏的部件。

    注: 如果更换连杆或活塞销轴承,请参阅技术规格, "连杆"了解正确的步骤。



    图 1g03376749


    图 2g03371083


    图 3g03376813

  2. 将活塞顶部朝上放在适当的表面上。 使用工具 (B) 以将活塞销轴承 (9) 安装到连杆 (5) 上。

    注: 将各活塞销轴承 (9) 安装到连杆 (5) 的对面侧,在两个活塞销轴承 (9) 之间留出间隙 (X)。



    图 4g03376857

  3. 如有必要,将新的连杆轴承 (6) 安装到连杆 (5) 和连杆盖 (8) 中。 检查螺栓 (7) 或更换为新的螺栓以便于日后装配。


    图 5g02723373

  4. 使用清洁的发动机机油润滑活塞销 (3) 的孔。


    图 6g02864817

  5. 将活塞 (1) 顶部朝下放置在适当的表面上。 定位连杆 (5),使标记 (5A) 与活塞顶部的箭头标记 (5B) 处于同一侧。

  6. 将活塞销 (3) 装入活塞 (1) 中。 安装挡圈 (4)。


    图 7g02723365


    图 8g02723368


    图 9g02797867

  7. 将连杆和活塞 (1) 定位到软口台钳中。 使用工具 (A) 将三个环 (2) 安装到活塞 (1) 上。

  8. 如果已组装原来的活塞,按照步骤 8a 至步骤 8e 安装活塞环。.

    1. 将机油控制环的弹簧定位到活塞 (1) 的油环槽中。 中心线必须位于弹簧端部以内。

    2. 定位机油控制环,使文字 "TOP(顶部)"处于向上位置,并使用工具 (A) 安装在活塞和弹簧上方。 参考图 9。

      注: 确保中心线距活塞环间隙 180 度。

    3. 使用工具 (A) 将中间压缩环安装到活塞 (1) 的第二个槽中。 "TOP" 字样应朝上。 内表面上的倒角必须朝下。 参考图 9。

    4. 使用工具 (A) 将顶部压缩环安装到活塞 (1) 的顶槽中。 制造标记必须朝上。 参考图 9。

    5. 定位活塞环 (2),使其间隙彼此之间相隔 120 度。

  9. 对于其余的活塞和连杆组件,重复步骤 2 至 8e。

结束:

  1. 安装活塞和连杆。

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