3500B Locomotive Engines Caterpillar


Cylinder Head Valves

Usage:

3508B C8R



图 1g01441028

典型示例

注: 组装前,将清洁的发动机机油涂在进气门杆和排气门杆上。

(A) 从缸盖顶端到气门导管顶端的高度 ... 26.0 ± 1.0 毫米 (1.02 ± 0.04 英寸)

(1) 281-6157 弹簧

数量 ... 4
测试力下的长度 ... 59.29 毫米 (2.334 英寸)
测试力 ... 562.0 ± 28.0 牛 (126.3 ± 6.3 磅)
测试后的自由长度 ... 75.8 毫米 (2.98 英寸)
外径 ... 43.47 毫米 (1.711 英寸)

(2) 194-4902 弹簧

数量 ... 4
测试力下的长度 ... 50.34 毫米 (1.982 英寸)
测试力 ... 146.0 ± 7.3 牛 (32.8 ± 1.6 磅)
测试后的自由长度 ... 60.7 毫米 (2.39 英寸)
外径 ... 30.70 毫米 (1.209 英寸)

(3) 将两个气门杆密封件安装到进气门上。

(4) 将两个垫圈安装到排气门上。

(B) 气门尺寸

进气门杆直径 ... 9.441 ± 0.010 毫米 (0.3717 ± 0.0004 英寸)
排气门杆直径 ... 12.464 ± 0.025 毫米 (0.4907 ± 0.0010 英寸)

(C) 缸盖上气门座圈的孔径

进气门 ... 60.508 ± 0.025 毫米 (2.3822 ± 0.0010 英寸)
排气门 ... 60.000 ± 0.025 毫米 (2.3622 ± 0.0010 英寸)

(5) 气门导管

安装后的进气门导管孔径 ... 9.487 ± 0.025 毫米 (0.3735 ± 0.0010 英寸)
安装后的排气门导管孔径 ... 12.619 ± 0.025 毫米 (0.4968 ± 0.0010 英寸)

(D) 气门面角

进气门 ... 19.40 ± 0.25 度
排气门 ... 44.40 ± 0.25 度

(E) 气门盖直径 ... 56.00 ± 0.15 毫米 (2.205 ± 0.006 英寸)




图 2g01441032

典型示例

(F) 气门座圈直径

进气门 ... 60.627 ± 0.015 毫米 (2.3869 ± 0.0006 英寸)
排气门 ... 60.119 ± 0.015 毫米 (2.3669 ± 0.0006 英寸)

(G) 气门座圈的面角

进气门 ... 20.00 ± 0.25 度
排气门 ... 45.00 ± 0.25 度

(H) 缸盖上气门座圈孔的深度 ... 16.00 ± 0.15 毫米 (0.630 ± 0.006 英寸)

(G) 气门座圈面的外径 ... 53.6 毫米 (2.11 英寸)

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