G3512H and G3516H Generator Set Engines Caterpillar


Pistons and Connecting Rods - Remove and Install

Usage:

G3512H GF4

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 
271-0498  涨圈 
Loctite 8012 

开始:

  1. 拆下缸盖。

  2. 拆下活塞冷却喷嘴。


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 1g00913801

  1. 用工具 (A)转动曲轴,直至可以拆下螺栓 (1)。

  2. 从缸套内表面顶部开始清除积碳凸起。

  3. 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。

  4. 拆下螺栓 (1) 和连杆盖 (2)。 推动连杆直到活塞环脱出缸套。

  5. 将活塞和连杆从缸套中拆下。

    注: 在拆卸活塞和连杆期间,小心不要损坏缸套或曲轴轴颈。



    图 2g03716090

  6. 拆下固定活塞销 (4) 的挡圈。 拆卸活塞销 (4)。 从连杆 (5) 上拆卸活塞 (3)。

  7. 将轴承从连杆 (5)和连杆盖上拆下。

    注: 如有必要,将活塞裙从活塞顶上分开。



    图 3g03716091

  8. 使用工具 (B) 从活塞 (3) 上拆卸活塞环 (6)。

安装步骤

  1. 按与拆卸相反的顺序安装活塞 (3) 和连杆 (5)。

    1. 对于刮油环,确保弹簧末端与环开口成180度。 从环的间隙必须能看见弹簧的白色部分。

    2. 安装中间环时让有 "UP-2" 标记的一侧朝向活塞顶部。

    3. 安装上环,带有 "UP-1" 标记的一侧朝向活塞顶部。

    4. 安装挡圈后,旋转挡圈以确保间隙彼此相隔120度。 机油控制环形开口朝向活塞销的孔。

    5. 将工具 (C) 涂敷在螺栓 (1) 的螺纹上。


      图 4g03739270
      显示拧紧次序的连杆剖视图。 可以将导角 (7) 和定位销 (8) 用作基准定向。

    6. 拧紧螺栓 (A) 和螺栓 (B) 至扭矩为 90 ± 5 N·m (65 ± 4 lb ft)

    7. 拧紧螺栓 (C) 和螺栓 (D) 至扭矩为 90 ± 5 N·m (65 ± 4 lb ft)

    8. 再次拧紧螺栓 (C) 和螺栓 (D) 至扭矩为 90 ± 5 N·m (65 ± 4 lb ft)

    9. 将指示标记置于螺栓和连杆盖上。 将每个螺栓都再拧紧 90 ± 5 度(1/4 圈)。

结束:

  1. 安装缸盖。

  2. 安装活塞冷却喷嘴。

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