3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Cylinder Head

Usage:

769C 01X



图 1g01392039

注: 组装前,使用清洁发动机机油润滑缸盖螺栓的螺纹。

缸盖螺栓的拧紧顺序如下:

  1. 按照数字顺序拧紧螺栓 (1) 到 (10) 。

    扭矩 ... 270 ± 25 N·m (200 ± 18 lb ft)

  1. 按照数字顺序拧紧螺栓 (1) 到 (10) 。

    扭矩 ... 450 ± 20 N·m (330 ± 15 lb ft)

  1. 按照数字顺序拧紧螺栓 (1) 到 (10) 。

    扭矩 ... 450 ± 20 N·m (330 ± 15 lb ft)

  1. 将摇臂组件安装到缸盖上。

  1. 按照数字顺序拧紧螺栓 (11) 到 (18) 。

    扭矩 ... 270 ± 25 N·m (200 ± 18 lb ft)

  1. 再次按照数字顺序拧紧螺栓 (11) 到 (18) 。

    扭矩 ... 450 ± 20 N·m (330 ± 15 lb ft)

  1. 按照数字顺序最终拧紧螺栓 (11) 到 (18) 。

    扭矩 ... 450 ± 20 N·m (330 ± 15 lb ft)

    注: 仅在缸盖螺栓最终拧紧后才拧紧螺栓 (19) 至螺栓 (27) 。

  1. 按照任意拧紧顺序拧紧螺栓 (19) 至螺栓 (27) 。

    扭矩 ... 47 ± 7 N·m (35 ± 5 lb ft)

(28) 将锥形锁紧螺柱拧紧至各缸盖,拧紧扭矩值如下。 ... 35 ± 5 N·m (26 ± 4 lb ft)




图 2g01391584

如配备,使用以下步骤将燃油泵支架和正时盖支架拧紧至缸盖:

注: 安装前,使用清洁发动机机油润滑螺栓的螺纹。

注: 仅在缸盖螺栓最终拧紧后才拧紧螺栓。

(30) 使用以下步骤拧紧螺栓:

  1. 将燃油泵支架定位到缸盖中的螺栓孔上。 穿过支架安装螺栓 (30) 。 用手拧紧螺栓。

  1. 从燃油泵上拆下两颗螺栓以安装螺栓 (29) 。

  1. 将燃油泵对准燃油泵支架并安装螺栓 (29) 。 用标准扭矩拧紧螺栓。

  1. 拧紧螺栓 (30) 。

    扭矩 ... 44 ± 7 N·m (32 ± 5 lb ft)

(31) 采用以下步骤拧紧螺栓:

  1. 将壳体支架定位到缸盖中的螺栓孔上。 穿过支架安装螺栓 (31) 。 用手拧紧螺栓。

  1. 将正时齿轮壳体安装到支架上,并用标准扭矩拧紧螺栓。

  1. 拧紧螺栓 (31) 。

    扭矩 ... 44 ± 7 N·m (32 ± 5 lb ft)

(32) 将杯形螺塞安装到各缸盖后侧的以下距离。 ... 4.3 ± 0.8 mm (0.17 ± 0.03 in)

(33) 将杯形螺塞安装到各缸盖前后侧的以下距离。 ... 2.5 ± 0.8 mm (0.10 ± 0.03 in)




图 3g01017447

(A) 新缸盖的高度 ... 112.78 ± 0.25 mm (4.440 ± 0.010 in)




图 4g01388111

注: 使用 6V-6640 密封剂 涂抹杯形螺塞。

(D) 将杯形螺塞安装到缸盖中,安装深度如下。 ... 4.5 ± 0.5 mm (0.18 ± 0.02 in)

(E) 将杯形螺塞安装到缸盖中,安装深度如下 ... 2.0 ± 0.5 mm (0.08 ± 0.02 in)




图 5g01391664

注: 安装喷嘴适配器前,先用肥皂液(40% 固体)涂抹 O 形密封圈 (35) 和缸盖孔。

注: 安装前,将 4C-5599 防粘结剂 涂抹到喷嘴适配器的螺纹上。

(34) 将喷嘴适配器拧紧至以下扭矩。 ... 200 ± 14 N·m (150 ± 10 lb ft)

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