3606 and 3608 Engines Caterpillar


Camshaft

Usage:

3608 6MC



图 1g00515083

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

安装后凸轮轴轴承孔 ... 174.00 ± 0.05 mm (6.850 ± 0.002 in)

(2) 新隔板的厚度 ... 11.80 ± 0.05 mm (0.465 ± 0.002 in)

(3) 正时螺栓的定位位置




图 2g00289768

凸轮轴轴颈上定位销的位置




图 3g00469453

凸轮轴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。

(5) 定位槽

(6) 单个定位销的位置面向凸轮轴轴承轴颈

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)

(7) 可变定位销的位置面向凸轮轴轴承轴颈

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 4g00289771

3606 凸轮轴轴颈的指定字符




图 5g00469407

3608 凸轮轴轴颈的指定字符

(8) 凸轮轴轴承轴颈

安装凸轮轴轴承轴颈,使槽端朝向发动机的前端。

(9) 凸轮轴块

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

(10) 拧紧凸轮轴块的螺栓至以下扭矩。 ... 270 ± 40 N·m (200 ± 30 lb ft)

(11) 必须将凸轮轴组装到装配夹具或缸体中。

在凸轮轴 (11) 的后端施加压力。 3606 的滚动扭矩必须是以下的最大值。 ... 22 N·m (16 lb ft)
在凸轮轴 (11) 的后端施加压力。 3608 的滚动扭矩必须是以下的最大值。 ... 28 N·m (21 lb ft)



图 6g00289772

(12) 规定的凸轮轴凸轮升程

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 (13) 的总高度。

  1. 测量基圆 (14) 。

  1. 从凸轮轴 (13) 的总高度中减去基圆 (14) 。 所得的差就是规定的凸轮轴凸轮升程 (12) 。

  1. 凸轮轴的规定凸轮轴凸轮升程 (12) 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)

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