3406E and 3456 Engines for Caterpillar Built Machines Caterpillar


Camshaft

Usage:

988G 2TW

1 型




图 1g00562795

185-9699 凸轮轴总成

(1) 排气凸轮

(2) 喷油器凸轮

(3) 进气凸轮

注: 用按 50/50 比例混合的 8T-2998 润滑剂 和清洁发动机机油润滑凸轮轴凸轮。

(4) 轴承轴颈

轴承轴颈直径 ... 84.85 ± 0.02 mm (3.341 ± 0.001 in)

注: 安装凸轮轴之前,先用清洁的发动机机油润滑凸轮轴轴承。

(5) 凸轮轴前部




图 2g00466866

(6) 凸轮轴凸轮升程

规定的凸轮轴凸尖升程
排气凸轮 ... 8.515 mm (0.3352 in)
进气凸轮 ... 9.431 mm (0.3713 in)
喷油器凸轮 ... 10.451 mm (0.4115 in)

(7) 凸轮轴凸轮高度

(8) 基圆

利用以下程序确定凸轮升程:

  1. 测量凸轮轴凸轮高度 (7) 。

  1. 测量基圆 (8) 。

  1. 从凸轮轴凸轮高度(步骤 1)中减去基圆测量值(步骤 2)。 二者之差即为实际凸轮升程。

实际凸轮升程(步骤 3)与新凸轮轴的规定凸轮升程之间的最大允许差值 ... 0.13 mm (0.005 in)




图 3g00544839

(9) 螺栓

拧紧将盖固定在缸盖的螺栓至以下扭矩值。 ... 13 ± 3 N·m (10 ± 2 lb ft)

2 型




图 4g00562795

6I-1543 130-9710 凸轮轴总成

(1) 排气凸轮

(2) 喷油器凸轮

(3) 进气凸轮

注: 用按 50/50 比例混合的 8T-2998 润滑剂 和清洁发动机机油润滑凸轮轴凸轮。

(4) 轴承轴颈

轴承轴颈直径 ... 84.85 ± 0.02 mm (3.341 ± 0.001 in)

注: 安装凸轮轴之前,先用清洁的发动机机油润滑凸轮轴轴承。

(5) 凸轮轴前部




图 5g00466866

(6) 凸轮轴凸轮升程

规定的凸轮轴凸尖升程
排气凸轮 ... 8.515 mm (0.3352 in)
进气凸轮 ... 9.702 mm (0.3820 in)
喷油器凸轮 ... 10.451 mm (0.4115 in)

(7) 凸轮轴凸轮高度

(8) 基圆

利用以下程序确定凸轮升程:

  1. 测量凸轮轴凸轮高度 (7) 。

  1. 测量基圆 (8) 。

  1. 从凸轮轴凸轮高度(步骤 2)中减去基圆(步骤 1)。 二者之差即为实际凸轮升程。

实际凸轮升程(步骤 3)与新凸轮轴的规定凸轮升程之间的最大允许差值 ... 0.13 mm (0.005 in)




图 6g00544839

(9) 螺栓

拧紧将盖固定在缸盖的螺栓至以下扭矩值。 ... 13 ± 3 N·m (10 ± 2 lb ft)

Caterpillar Information System:

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