Cylinder Head Valves
注: 有关检查旧气门和气门弹簧的必要程序和规格,请参考再用零件准则, SEBF8002或参考再用零件准则, SEBF8034。
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图 1 | g00344097 |
(1) 7S-7144 弹簧 (气门的新弹簧
- 试验力下的长度 ... 44.86 mm (1.766 inch)
- 试验力 ... 257 ± 25 N (57.7 ± 4.5 lb)
- 试验力下的长度的"再用"最低负荷 ... 217 N (48.8 lb)
- 气门处于打开位置时的弹簧长度 ... 32.28 mm (1.271 inch)
- 气门处于打开位置时的"再用"最低负荷 ... 658 N (148.5 lb)
- 试验后的自由长度 ... 52.07 mm (2.050 inch)
- 外径 ... 35.21 mm (1.386 inch)
- 不要让弹簧弯曲超过以下数值。 ... 1.82 mm (.072 inch)
- 试验力 ... 257 ± 25 N (57.7 ± 4.5 lb)
(2) 到气门导管顶端的高度 ... 22.23 ± 0.25 mm (.875 ± .010 inch)
(3) 新气门杆
- 新气门杆直径 ... 9.441 ± 0.008 mm (.3717 ± .0003 inch)
- "再用"最小直径 ... 9.408 mm (.3704 inch)
安装在缸盖上的气门导管的内径
- 新件最小直径 ... 9.478 mm (.3731 inch)
- 磨损件最大直径 ... 9.581 mm (.3772 inch)
(4) 气门唇缘厚度
- 6N-9916 排气门 的最小"再用"厚度 ... 2.69 mm (.106 inch)
- 2W-2620 进气门 的最小"再用"厚度 ... 2.69 mm (.106 inch)
- 100-7861 排气门 和 148-7455 排气门 的最小"再用"厚度 ... 2.56 mm (.101 inch)
- 100W-7860 进气门 的最小"再用"厚度 ... 2.02 mm (.080 inch)
- 2W-2620 进气门 的最小"再用"厚度 ... 2.69 mm (.106 inch)
(5) 气门头直径
- 排气门 ... 48.16 ± 0.13 mm (1.896 ± .005 inch)
- 进气门 ... 51.31 ± 0.13 mm (2.020 ± .005)
(6) 阀面的角度 ... 29.25 ± .25 度
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图 2 | g00344098 |
(7) 缸盖气门镶座的孔深 ... 12.28 ± 0.13 mm (.483 ± .005 inch)
(8) 气门镶座
- 排气门气门镶座的直径 ... 50.889 ± 0.013 mm (2.0035 ± .0005 inch)
- 缸盖排气门气门镶座的孔径 ... 50.813 ± 0.030 mm (2.0005 ± .0012 inch)
- 进气门气门镶座的直径 ... 52.032 ± 0.013 mm (2.0485 ± .0005 inch)
- 缸盖进气门气门镶座的孔径 ... 51.956 ± 0.030 mm (2.0455 ± .0012 inch)
- 缸盖排气门气门镶座的孔径 ... 50.813 ± 0.030 mm (2.0005 ± .0012 inch)
(9) 气门镶座工作面的角度 ... 30.25 ± 0.50 度
(10) 进气门和排气门的座面宽度
- 最大容许宽度 ... 1.93 mm (.076 inch)
- 最小容许宽度 ... 1.14 mm (.045 inch)
(11) 从闭合气门的顶端到缸盖表面的尺寸
- 排气门的最小容许尺寸 ... 0.66 mm (.026 inch)
- 进气门的最小容许尺寸 ... 0.15 mm (.006 inch)
(12) 气门镶座工作面的外界直径
- 排气座面 ... 46.02 mm (1.812 inch)
- 排气座面的最大容许尺寸 ... 47.29 mm (1.862 inch)
- 进气座面 ... 49.28 mm (1.940 inch)
- 进气座面的最大容许尺寸 ... 50.55 mm (1.990 inch)
- 排气座面的最大容许尺寸 ... 47.29 mm (1.862 inch)
(13) 以15度角度研磨镶座工作面的座面以便获得缩小的最大座面直径。
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