C27 and C32 Engines for Caterpillar Built Machines Caterpillar


Valve Mechanism

Usage:

992K 880



图 1g01568474

(1) 摇臂

(4) 凸轮轴

(5) 气门桥

(2) 螺母的扭矩 ... 30 ± 7 N·m (22 ± 5 lb ft)

(3) 摇臂轴组件的尺寸

新摇臂轴的直径 ... 40.000 ± 0.010 mm (1.5748 ± 0.0004 in)
新摇臂中的摇臂轴孔的直径 ... 40.065 ± 0.015 mm (1.5774 ± 0.0006 in)

注: 请参考测试和调整, "发动机气门间隙 - 检查/调整"以了解设置发动机气门间隙的正确步骤。

(A) 气门间隙的尺寸

进气 ... 0.38 ± 0.08 mm (0.015 ± 0.003 in)
排气 ... 0.76 ± 0.08 mm (0.030 ± 0.003 in)



图 2g01568478

发动机左视图




图 3g01568479

发动机右侧视图




图 4g01568481

拧紧顺序

使用以下步骤拧紧摇臂轴螺栓 (6) ,如图 4 所示:

  1. 按照顺序 2、3、1、4 将摇臂轴螺栓拧紧至扭矩为 50 ± 5 N·m (37 ± 4 lb ft)。

  1. 再次按照顺序 2、3、1、4 将摇臂轴螺栓拧紧 45 ± 5 度的角度。

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