C9.3 Engine for Caterpillar Built Machines Caterpillar


Valve Mechanism

Usage:

725C2 2L6



图 1g01585815

(2) 气门桥

(3) 气门推杆

(4) 安装前,用清洁发动机机油和 8T-2998 润滑剂 的 50/50 混合液润滑缸体中用于气门挺杆组件的孔。

注: 为检查发动机气门间隙的设定值,发动机必须是冷机且发动机必须停止。

气门间隙尺寸

进气门 ... 0.38 ± 0.08 mm (0.015 ± 0.003 in)
排气门 ... 0.64 ± 0.08 mm (0.025 ± 0.003 in)

(1) 螺母的扭矩 ... 30 ± 7 N·m (266 ± 62 lb in)

注: 设定气门间隙之后,拧紧螺母 (1) 。 重新检查气门间隙。




图 2g01585816

(A) 摇臂的尺寸

摇臂轴的摇臂孔 ... 28.050 ± 0.013 mm (1.1043 ± 0.0005 in)
摇臂轴的直径 ... 28.000 ± 0.013 mm (1.1024 ± 0.0005 in)

(B) 杯塞的安装深度 ... 1.25 ± 0.25 mm (0.049 ± 0.010 in)




图 3g01585833

右视图

(5) 按照图 3 中所示的数字顺序,将七个螺栓拧紧至 100 ± 20 N·m (75 ± 15 lb ft)。

(6) 163-2459 弹簧

在测试力下的长度 ... 14.50 mm (0.571 in)
测试力 ... 65.0 ± 3.5 N (14.6 ± 0.8 lb)
测试后近似的自由长度 ... 30.75 mm (1.211 in)

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