C13, C15, and C18 Tier 4 Final Engines Caterpillar


Cylinder Head Valves

Usage:

826K 232



图 1g02665396

表 1
346-0485 缸盖总成 的技术规格    
项目     数量     零件     技术规格说明    
1     12     262-2957 进气门     装配缸盖气门前,使用清洁的发动机机油涂覆气门导管内径。    
气门头直径为
41.50 ± 0.13 mm (1.634 ± 0.005 in)。
表面角度为 29.50 ± 0.25 度。
2     12     255-8676 排气门     装配缸盖气门前,使用清洁的发动机机油涂覆气门导管内径。    
气门头直径为
37.50 ± 0.13 mm (1.476 ± 0.005 in)。
端面角度为 44.25 ± 0.25 度。
3     24     349-5307 弹簧     在试验力下的长度为
47.35 mm (1.864 in)。    
试验力为
465.0 ± 23.3 N (104.5 ± 5.2 lb)。
测试后的自由长度约为
77.9 mm (3.07 in)。
4     24     349-5303 弹簧     在试验力下的长度为
46.15 mm (1.817 in)。    
试验力为
232.5 ± 11.6 N (52.3 ± 2.6 lb)。
测试后的自由长度约为
74.60 mm (2.937 in)。
装配气门导管前,使用清洁的发动机机油涂覆用于安装气门导管的缸盖孔。    
5     24     255-8665 气门导管     在缸盖的弹簧侧安装气门导管。 在气门导管安装到缸盖后,检查气门导管内径是否变形。    
外径为
13.030 ± 0.008 mm (0.5130 ± 0.0003 in)。
内径为
8.072 ± 0.013 mm (0.3178 ± 0.0005 in)。
将气门导管装配到缸盖中后,在气门导管顶端安装密封。    
A         -     气门杆直径为
8.000 ± 0.010 mm (0.3150 ± 0.0004 in)。    



图 2g02665477

典型示例

表 2
346-0485 缸盖总成 的技术规格    
项目     数量     零件     技术规格说明    
B     -     -     缸盖中用于安装进气门气门座镶圈的孔的深度为
9.30 ± 0.05 mm (0.366 ± 0.002 in)。    
缸盖中用于安装排气门气门座镶圈的孔的深度为
10.40 ± 0.05 mm (0.409 ± 0.002 in)。
C     24     -     255-8666 进气门气门座镶圈 的直径为
42.560 ± 0.013 mm (1.6756 ± 0.0005 in)。    
缸盖中用于安装进气门气门座镶圈的孔径为
42.500 ± 0.015 mm (1.6732 ± 0.0006 in)。
262-2959 排气门气门座镶圈 的直径为
39.060 ± 0.013 mm (1.5378 ± 0.0005 in)。
缸盖中用于安装排气门气门座镶圈的孔径为
39.000 ± 0.015 mm (1.5354 ± 0.0006 in)。

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