C3.4B Engines for Caterpillar Built Machines Caterpillar


Connecting Rod Bearings - Install - Connecting rods in position

Usage:

CD-44B 398

安装步骤

表 1
所需工具    
工具     零件号     零件描述     数量    
A     8T-3052     度数轮     1    


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。



注意

废弃所有旧的连杆紧固件。


  1. 检查曲轴销有无损坏。 如果曲轴已损坏,更换曲轴。 有关正确的步骤,请参阅拆解和组装, "曲轴 - 拆卸"和拆解和组装, "曲轴 - 安装"。 确保主轴承轴瓦清洁且无磨损或损坏。 如有必要,更换主轴承轴瓦。

    注: 如果更换了主轴承轴瓦,检查之前是否安装了加大尺寸的主轴承轴瓦。

  1. 确保曲轴处于下止点。



    图 1g02015553

  1. 将上轴瓦 (4) 安装到连杆 (5) 上。 确保上轴瓦的定位凸舌正确座入连杆的槽中。

    注: 上轴瓦的两端必须位于连杆中央。 上轴瓦的两端与连杆配合面的距离必须相等。

  1. 使用清洁的发动机机油润滑上轴瓦 (4) 。

  1. 小心地引导连杆 (5) ,使其抵到曲轴销上。

    注: 不要使连杆接触活塞冷却喷嘴。

  1. 清洁连杆盖 (2) 。 将下轴瓦 (3) 安装到连杆盖 (2) 上。 确保下轴瓦的定位凸舌正确座入连杆盖的槽中。

  1. 使用清洁的发动机机油润滑曲轴销和下轴瓦 (3) 。



    图 2g03005637

  1. 将连杆盖 (2) 安装到连杆 (5) 上。

    注: 确保连杆盖 (2) 位置 (X) 与连杆 (5) 位置 (X) 上的蚀刻编号相互匹配。 确保连杆盖的朝向正确。 上下轴瓦的定位凸舌应在同一侧。

    注: 请勿重复使用旧螺栓来固定连杆盖。

  1. 安装新螺栓 (1) 并拧紧至扭矩为 50 N·m (36 lb ft)。 顺时针再转动螺栓 70 度。 使用工具 (A) 来实现所需的扭矩。

  1. 确保连杆组件安装后有能感觉到的侧隙。 转动曲轴,确保没有卡滞。

    注: 如果需要更换所有连杆轴承,可以同时在两个气缸上进行本程序。 本程序可在下列气缸配对上同时进行。 1 和 4 然后 2 和 3。 开始下一对连杆上的拆卸步骤前,确保一对连杆上的安装步骤已完成。

  1. 重复步骤 1 至步骤 10,以便安装其余的连杆轴承。

End By:

  1. 如有必要,安装平衡器。 有关正确步骤,请参阅 拆解和装配, "平衡器 - 安装"。
  2. 安装发动机机油吸油管。 有关正确步骤,请参阅 拆解和装配, "发动机油底壳 - 拆卸和安装"。

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