3406C Engines for Caterpillar Built Machines Caterpillar


Cylinder Block

Usage:

627F 1DL



图 1g00503937

缸体前方视图

(1) 隔板和密封垫厚度

隔板的厚度 ... 8.585 ± 0.025 mm (.3380 ± .0010 in)
放置在隔板和发动机缸体之间的密封垫的厚度 ... 0.208 ± 0.025 mm (.0082 ± .0010 in)
缸套超出隔板的高度应该为以下尺寸。 ... 0.0885 ± 0.0635 mm (.0035 ± .0025 in)

注: 缸套超出隔板的高度应该在安装压力下测量。

(2) 曲轴轴承孔中心线至缸体顶部(顶面)的尺寸

新机 ... 425.45 ± 0.15 mm (16.750 ± .006 in)
最低 ... 425.02 mm (16.733 in)

注: 缸体整个接触面的平整度必须在 0.10 mm (.004 in) 以内。 表面任何 177.5 mm (6.99 in) 范围内的平整度必须在 0.05 mm (.002 in) 以内。 允许的最大表面光洁度规格是 0.0032 mm (.0001 in)。

(3) 螺栓

将四个螺栓拧紧至以下扭矩。 ... 25 ± 6 N·m (18 ± 4 lb ft)

(4) 螺塞

将螺塞拧紧至以下扭矩。 ... 70 ± 10 N·m (52 ± 7 lb ft)

(5) 用于安装主轴承的缸体孔

新轴承的标准尺寸 ... 129.891 ± 0.013 mm (5.1138 ± .0005 in)
大于原始尺寸 0.63 mm (0.025 in) ... 130.526 ± 0.013 mm (5.1388 ± .0005 in)

(6) 用于安装凸轮轴轴承的缸体孔

孔径 ... 76.835 ± 0.018 mm (3.0250 ± .0007 in)

注: 安装凸轮轴轴承时,轴承油孔要求位于水平中心线上。 确保轴承接头位置在油孔以上。

(7) 螺塞

将螺塞拧紧至以下扭矩。 ... 35 ± 7 N·m (26 ± 5 lb ft)

(8) 主轴承盖尺寸

主轴承盖的宽度 ... 215.900 ± 0.025 mm (8.5000 ± 0010 in)
用于安装主轴承盖的缸体宽度 ... 215.900 ± 0.025 mm (8.5000 ± 0010 in)
主轴承盖的侧边和缸体之间的间隙 ... 0.038 mm(.0015 in)紧配合至 0.038 mm(.0015 in)松配合

(9) 螺塞

将螺塞拧紧到以下扭矩。 ... 70 ± 10 N·m (52 ± 7 lb ft)

(10) 主轴承盖螺栓

注: 安装主轴承盖,将冲压在主轴承盖上的箭头朝向发动机前方。 将每个盖安装到正确位置。 每个盖底部冲压的数字应朝向铸造在缸体上的相应数字。

以下步骤描述了主轴承盖螺栓的正确安装方法。

(a) 将 4C-5593 防咬合剂 涂在以下部件上。 ... 主轴承盖螺栓 (b) 将轴承盖的轴承凸舌一侧上的螺栓先拧紧至以下扭矩。 ... 258 ± 14 N·m (190 ± 10 lb ft) (c) 将轴承凸舌相反一侧上的螺栓拧紧至以下扭矩。 ... 258 ± 14 N·m (190 ± 10 lb ft) (d) 将轴承凸舌相反一侧上的螺栓顺时针旋转至以下角度。 ... 120 ± 5 度 (d) 将轴承凸舌一侧上的螺栓顺时针旋转至以下角度。 ... 120 ± 5 度

(11) 从曲轴轴承孔中心线到缸体底部的距离如下。 ... 165.10 ± 0.10 mm (6.500 ± .004 in)




图 2g00503939

缸体右手侧视图

(12) 两个端定位销超出缸体表面的高度 ... 18.5 ± 0.5 mm (.73 ± .02 in)

注: 在安装到缸体中之前,将 7M-7456 轴承安装固定胶 涂在两个端定位销上。

(13) 两个中间定位销超出缸体表面的高度 ... 16.0 ± 0.5 mm (.63 ± .02 in)

(14) 定位销超出缸体表面突出量的距离 ... 19.1 ± 0.5 mm (.75 ± .02 in)

(15) 活塞冷却喷嘴

将用于固定活塞冷却喷嘴的螺栓拧紧至以下扭矩。 ... 35 ± 3 N·m (26 ± 2 lb ft)
在活塞和活塞冷却喷嘴之间的最小允许间隙 ... .64 mm (.025 in)



图 3g00503548

缸体前方视图

(16) 从定位销孔垂直中心线到先导孔垂直中心线的尺寸 ... 186.33 mm (7.336 in)

(17) 惰轮轴先导孔

缸体中的惰轮轴先导孔 ... 31.750 ± 0.025 mm (1.2500 ± .0010 in)
自缸体表面的孔深度 ... 11.9 ± 2.5 mm (.47 ± .10 in)

(18) 从定位销和曲轴水平中心线到先导孔水平中心线的距离 ... 247.02 mm (9.725 in)

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