3612 and 3616 Engines Caterpillar


Camshaft - Later

Usage:

3616 1PD



图 1g00575160

(1) 新止推板的厚度 ... 15.00 ± 0.25 mm (0.600 ± 0.010 in)

新止推板凸轮轴表面的厚度 ... 12.00 ± 0.05 mm (0.472 ± 0.002 in)

(2) 凸轮轴轴颈的直径 ... 173.80 ± 0.03 mm (6.843 ± 0.001 in)

安装后的凸轮轴轴承孔孔径 ... 174.151 ± 0.020 mm (6.8563 ± 0.0008 in)

(3) 止推板的厚度 ... 11.80 ± 0.05 mm (0.465 ± 0.002 in)




图 2g00575169

凸轮轴轴承轴颈上定位销的位置




图 3g00575214

凸轮轴轴承轴颈上定位销的位置


注意

在组装时应遵守正确的凸轮段关系(正时)。 如果凸轮段不合拍,将发生严重的发动机损坏。


注: 与可变定位销相关的单个定位销的位置取决于凸轮轴轴颈的指定字符。 单个定位销和定位槽在同一端。 可变定位销和定位槽在同一端。

(4) 定位槽

(5) 定位销的位置面向凸轮轴轴颈

从定位销顶面到凸轮轴轴颈之间的距离 ... 7.0 ± 0.5 mm (0.28 ± 0.02 in)

(6) 定位销的位置面向凸轮轴轴颈

从定位销顶面到凸轮轴轴颈之间的距离 ... 7.0 ± 0.5 mm (0.28 ± 0.02 in)



图 4g00575220

3612 凸轮轴轴颈的字母标识

(7) 3612 凸轮轴必须组装到装配工具或缸体内。

3612 凸轮轴的轧制扭矩最大为以下值。 ... 22 N·m (16 lb ft)




图 5g00575259

3616 凸轮轴轴颈的字母标识

(8) 3616 凸轮轴必须组装到装配工具或缸体内。

3616 的轧制扭矩最大为以下值。 ... 28 N·m (21 lb ft)

(9) 凸轮轴轴承轴颈

安装凸轮轴轴承轴颈,使槽端朝向发动机 (13) 的前端。

(10) 凸轮轴块

安装凸轮轴块,使槽面法兰朝向 SAE 标准旋转发动机的前端。 安装凸轮轴块,使槽面法兰朝向 SAE 反向旋转发动机的后端。

(11) 将凸轮轴凸轮段的螺栓拧紧至以下扭矩。 ... 270 ± 40 N·m (200 ± 30 lb ft)

(12) 发动机的后端

(13) 发动机的前端




图 6g00595829

(14) 规定的凸轮凸角升程

为了找到规定的凸轮轴凸轮升程,请使用以下步骤:

  1. 测量凸轮轴 (15) 的总高度。

  1. 测量基圆 (16) 。

  1. 从凸轮轴 (15) 的总高度中减去基圆 (16) 。 所得的差就是规定的凸轮轴凸轮升程 (14) 。

  1. 凸轮轴的规定凸轮轴凸轮升程 (14) 值如下:

    排气凸轮 ... 19.500 mm (0.7677 in)

    进气凸轮 ... 19.500 mm (0.7677 in)

    喷油泵凸轮 ... 21.473 mm (0.8454 in)

Caterpillar Information System:

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