3406C Engines for Caterpillar Built Machines Caterpillar


Cylinder Head Valves

Usage:

627F 1DL



图 1g00489235

注: 请参阅以下公告,了解气门和气门弹簧的再用性。

  • 再用零件SEBF8002, 指南

  • 再用零件SEBF8034, 指南

(1) 4W-2472 弹簧

组装后的长度 ... 50.24 mm (1.978 in)
组装长度上的负载 ... 178 ± 18 N40 (± 4.1 lb)
工作长度(最小) ... 35.97 mm (1.416 in)
最小工作长度上的负载 ... 343 ± 17 N (77.2 ± 3.8 lb)
试验后的自由长度 ... 65.7 mm (2.60 in)
外径 ... 25.13 mm (.989 in)
颜色编码 ... 橙色条纹或蓝色条纹

(2) 4W-2471 弹簧

组装后的长度 ... 53.24 mm (2.096 in)
组装长度上的负载 ... 245 ± 24 N55 (.1 ± 5.4 lb)
工作长度(最小) ... 38.96 mm (1.534 in)
最小工作长度上的负载 ... 805 ± 40 N (181.1 ± 9.0 lb)
试验后的自由长度 ... 59.46 mm (2.341 in)
外径 ... 37.31 mm (1.469 in)
颜色编码 ... 橙色条纹或蓝色条纹

(3) 至气门导管顶部的高度 ... 27.2 ± 0.8 mm (1.07 ± .03 in)

(4) 新气门杆的直径 ... 9.441 ± 0.008 mm (.3717 ± .0003 in)

注: 在安装到缸盖中前,先用 8T-2998 润滑油 涂抹进气门杆和排气门杆。

如果符合气门杆的最小尺寸要求,气门可以再用。

排气门 ... 9.408 mm (.3704 in)
进气门 ... 9.408 mm (.3704 in)

已安装气门导管的孔 ... 9.487 ± 0.025 mm (.3735 ± .0010 in)

气门导管可以再用。 气门导管孔径不得大于以下数值。 ... 9.538 mm (.3755 in)

(5) 气门盖的直径

排气门 ... 41.81 ± 0.13 mm (1.646 ± 0.005 in)
进气门 ... 44.98 ± 0.13 mm (1.771 ± 0.005 in)

(6) 气门面的角度

进气门 ... 29 1/4 ± 1/4 度
排气门 ... 44 1/4 ± 1/4 度



图 2g00489418

(7) 用于安装气门座圈的缸盖孔的深度 ... 13.01 ± 0.15 mm (.512 ± .006 in)

(8) 气门座圈

进气门座圈直径 ... 46.025 ± 0.013 mm (1.8120 ± .0005 in)
用于安装进气门座圈的缸盖孔 ... 45.949 ± 0.025 mm (1.8090 ± .0010 in)
排气门座圈的直径 ... 42.850 ± 0.013 mm (1.6870 ± .0005 in)
用于安装排气门座圈的缸盖孔 ... 42.774 ± 0.025 mm (1.6840 ± .0010 in)
气门座圈和缸盖之间的过盈配合 ... 0.069 mm (.0027 in)

注: 将气门座圈冷却至 −62°C (−80°F),以便将气门座圈插入到缸盖中。

(9) 气门座圈面的角度

进气门座圈 ... 30 1/4 ± 1/2 度
排气门座圈 ... 45 1/4 ± 1/2 度

(10) 从关闭气门到缸盖表面的距离(最大值)

进入缸盖表面的距离 ... 1.22 mm (.048 in)
伸出缸盖表面的距离 ... 0.20 mm (.008 in)

(11) 气门座圈面外径

排气门 ... 40.41 ± 0.13 mm (1.591 ± .005 in)
进气门 ... 44.04 ± 0.13 mm (1.734 ± .005 in)

(12) 气门唇厚度的再用性指南

排气门 ... 2.03 mm (.080 in)
进气门 ... 2.51 mm (.099 in)

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