3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Cylinder Block

Usage:

769C 01X



图 1g01406987

典型实例

发动机前视图

注: 在组装过程中,缸体的上表面、板密封垫 (2) 的两侧和间隔板 (1) 的底面必须没有燃油、机油、水、密封垫粘合剂、装配附着剂和所有其他污染物。

(3) 3 个锥形锁紧螺柱的扭矩 ... 27 ± 4 N·m (20 ± 3 lb ft)

(A) 间隔板的厚度 ... 8.585 ± 0.025 mm (0.3380 ± 0.0010 in)

(B) 缸体和间隔板之间的板密封垫的厚度 ... 0.208 ± 0.025 mm (0.0082 ± 0.0010 in)

(C) 左排和右排上的定位销从缸体伸出的长度 ... 18.5 ± 0.5 mm (0.73 ± 0.02 in)

注: 组装前,将 5P-3413 管密封胶 涂抹到锥形锁紧螺塞 (4) 的螺纹上。

(4) 三个锥形锁紧螺塞的扭矩 ... 80 ± 15 N·m (60 ± 11 lb ft)

(D) 缸体中的主轴承孔的直径 ... 129.891 ± 0.013 mm (5.1138 ± 0.0005 in)

(E) 曲轴轴承盖的尺寸

主轴承盖上的狭槽的宽度 ... 215.900 ± 0.013 mm (8.5000 ± 0.0005 in)
主轴承盖宽度 ... 215.900 ± 0.025 mm (8.5000 ± 0.0010 in)



图 2g01406651

发动机右视图

(7) 将 6V-6640 密封剂 涂抹到杯形螺塞上。

(G) 定位销从缸体后端面和缸体前端面伸出的长度 ... 19.0 ± 0.5 mm (0.75 ± 0.02 in)




图 3g01406653

剖面 F-F

(8) 机油喷嘴管组件

(9) 专用螺塞的扭矩 ... 25 ± 7 N·m (18 ± 5 lb ft)

注: 安装轴承盖 (5) 时,必须使识别标记朝向发动机的前部。 主轴承盖 (5) 的编号也必须和每个主轴承鞍座左侧的铸造号码相吻合。

采用以下步骤拧紧主轴承盖:




图 4g01407019

主轴承拧紧标记

  1. 在主轴承盖螺栓 (6) 的螺纹上涂上清洁的发动机机油。 宽松地安装主轴承盖螺栓 (6) 。

  1. 首先将主轴承盖 (6) 的主轴承凸舌侧上的主轴承盖螺栓 (5) 拧紧至扭矩为 258 ± 14 N·m (190 ± 10 lb ft)。

  1. 将主轴承盖 (6) 的主轴承凸舌侧对面上的主轴承盖螺栓 (5) 拧紧至扭矩为 258 ± 14 N·m (190 ± 10 lb ft)。

  1. 在每个主轴承盖螺栓 (6) 和每个主轴承盖 (5) 上做上标记。 见图 4。

  1. 将主轴承盖 (6) 的主轴承凸舌侧对面上的主轴承盖螺栓 (5) 从标记处拧紧 120 ± 5 度的角度 (H) 。

  1. 将主轴承盖 (6) 的主轴承凸舌侧对面上的主轴承盖螺栓 (5) 从标记处拧紧 120 ± 5 度的角度 (H) 。



图 5g01406997

(J) 凸轮轴套筒轴承的缸径 ... 76.835 ± 0.018 mm (3.0250 ± 0.0007 in)

(K) 曲轴轴承孔中心线到缸体顶部的距离 ... 419.10 ± 0.15 mm (16.500 ± 0.006 in)

曲轴轴承孔中心线至缸体(顶部平台)顶部的最小距离 ... 418.67 mm (16.483 in)

(L) 曲轴轴承孔中心线到缸体底部的距离 ... 165.10 ± 0.10 mm (6.500 ± 0.004 in)

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