3512C Engine for 785D Off-Highway Truck/Tractors Caterpillar


Camshaft

Usage:

3512C B7F




图 1g02582277
典型示例

表 1
技术规格 - 273-5712 凸轮轴总成、 273-5713 凸轮轴总成和 308-5361 凸轮轴总成 
项目  数量  零件  技术规格说明 
新凸轮轴上止推垫圈组件的槽尺寸为 8.75 ± 0.05 mm (0.344 ± 0.002 inch)。 
4N-1650 定位销  凸轮轴间定位销的延伸长度为 22.0 ± 0.5 mm (0.87 ± 0.02 inch)。 
5B-5821 定位销  定位销从凸轮轴组件延伸的长度为 12.0 ± 0.5 mm (0.47 ± 0.02 inch)。 
128-5993 止推垫圈  新止推垫圈的厚度为 8.40 ± 0.05 mm (0.331 ± 0.002 inch)。 
轴承轴颈的直径为 91.88 ± 0.02 mm (3.617 ± 0.001 inch)
安装后凸轮轴轴承的孔径为 92.00 ± 0.08 mm (3.622 ± 0.003 inch)。 
新凸轮轴组件的端隙为 0.15 to 0.35 mm (0.006 to 0.014 inch)。 
16  5P-0076 螺栓  拧紧至扭矩为 55 ± 7 N·m (41 ± 5 lb ft)。 


图 2g02582338

表 2
技术规格 - 273-5712 凸轮轴总成、 273-5713 凸轮轴总成和 308-5361 凸轮轴总成 
项目  数量  零件  技术规格说明 
使用以下步骤确定实际凸轮轴凸轮升程:
1. 测量凸轮轴凸轮高度 (H)。
2. 测量基圆 (J)。
3. 从凸轮轴凸轮高度值 (H) 中减去基圆 (J)。 二者之差就是实际凸轮轴凸角升程。 
规定的凸轮轴凸轮升程
进气凸轮为 12.73 mm (0.501 inch)
喷油器凸轮为 13.8065 mm (0.54356 inch)
排气凸轮为 13.1 mm (0.52 inch)。 

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