3126B and 3126E Truck Engines Caterpillar


Connecting Rod

Usage:

3126B 1AJ



图 1g00594371

注: 连杆必须加热,以便进行活塞销轴承安装。 不要用喷枪。

为安装活塞销轴承,可将连杆加热到 175° 至 260 °C (347 °F 至 500 °F) 之间。

长度 (A) 是加热连杆的最大距离。 ... 75 ± 5 mm (3.0 ± 0.2 in)

轴承接头所成角度 (B) 必须在中心线以上 12.0 ± 5.0 度。

(1) 缸径尺寸

连杆中活塞销轴承的孔径 ... 43.191 ± 0.013 mm (1.7004 ± 0.0005 in)
轴承上的活塞销孔径 ... 40.028 ± 0.008 mm (1.5759 ± 0.0003 in)

(2) 轴承中心之间的距离 ... 200.00 mm (7.874 in)

(3) 组装后,蚀刻气缸编号在连杆和连杆盖上的位置。

注: 在连杆和连杆盖的这个位置 (3) ,蚀刻下气缸编号。 在连杆与轴承挡圈凹口相同一侧上标上编号。

(4) 连杆螺栓

(5) 用于曲轴连杆颈的连杆轴承孔径 ... 75.000 ± 0.013 mm (2.9527 ± 0.0005 in)

拧紧连杆螺栓。 使用以下说明:

  1. 安装连杆螺栓 (4) 前,用发动机机油润滑螺栓螺纹和连杆盖的座合面。

  1. 安装连杆螺栓 (4) 。

    将每个螺母拧紧至以下扭矩。 ... 54 ± 7 N·m (40 ± 5 lb ft)

  1. 在连杆盖和螺母上做对准标记。

  1. 将每个螺母再拧紧 60 ± 5 度(1/6 圈)。

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