3500B Engines for Caterpillar Built Power Modules Caterpillar


Connecting Rod

Usage:

793B 1HL



图 1g01416660

(A) 活塞销套筒轴承的轴承接头每侧中心线以上的角度。 ... 10 度

注: 安装活塞销的套筒轴承前,必须加热连杆。 请勿使用喷枪加热连杆。

(B) 连杆可以加热到 175 到 260 °C (347 到 500 °F) 以进行活塞销套筒轴承安装。 加热连杆的最小长度 ... 105 mm (4.1 in)

注: 在装配活塞和连杆前用清洁的发动机机油彻底润滑活塞销。

(C) 活塞销的尺寸

安装套筒轴承后,活塞销套筒轴承孔孔径 ... 70.000 ± 0.008 mm (2.7559 ± 0.0003 in)
活塞销套筒轴承连杆孔孔径 ... 75.760 ± 0.015 mm (2.9827 ± 0.0006 in)

(D) 轴承中心点之间的距离 ... 380 mm (15.0 in)

(E) 定位销自连杆盖的伸出长度 ... 4.0 ± 0.5 mm (0.16 ± 0.02 in)

(F) 向连杆螺栓施加最终扭矩后,曲轴连杆轴颈的轴承连杆孔孔径 ... 143.028 ± 0.015 mm (5.6310 ± 0.0006 in)

(G) 曲轴连杆轴承孔孔径 ... 135.133 至 135.194 mm (5.3202 至 5.3226 in)

(1) 在这个位置上,在连杆和连杆盖上刻下气缸编号。 将编号标记在连杆和连杆盖上。 在连杆与轴承挡圈凹口相同一侧上标上编号。

注: 将连杆安装到发动机上,零件号朝向发动机后部。




图 2g01526418

H-H 视图

(3) 用于正确安装连杆盖的定位销

(2) 将连杆和活塞总成安装至发动机时,该斜面侧必须与曲轴销止推面相邻。

同一个新曲轴销上的两个连杆之间的侧隙 ... 0.850 ± 0.332 mm (0.0335 ± 0.0131 in)

采用以下步骤拧紧连杆螺栓:

注: 螺栓 1 和螺栓 2 必须在具有轴承止动舌和定位销 (3) 的连杆盖的同一端。

  1. 组装前,将 6V-4876 润滑剂 涂在螺栓螺纹、螺栓杆和螺栓座上。

  1. 将螺栓 1 和螺栓 2 拧紧至 90 ± 5 N·m (66 ± 4 lb ft)。

  1. 将螺栓 3 和螺栓 4 拧紧至 90 ± 5 N·m (66 ± 4 lb ft)。

  1. 再次将螺栓 3 和螺栓 4 拧紧至 90 ± 5 N·m (66 ± 4 lb ft)。

  1. 再将所有螺栓拧紧 90 ± 5 度。

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