3406C Engines for Caterpillar Built Machines Caterpillar


Camshaft

Usage:

627F 1DL



图 1g00489223

(1) 凸轮轴上安装齿轮的最大允许温度 ... 315°C (600.0°F)

注: 不要使用喷枪加热齿轮。

(2) 齿轮和凸轮轴之间的过盈配合 ... 0.037 to 0.123 mm (.0015 至 .0048 in)

(3) 新凸轮轴轴承的表面(轴颈)直径 ... 69.850 ± 0.013 mm (2.7500 ± .0005 in)

在组装后,前轴承中的凸轮轴孔径 ... 69.969 ± 0.048 mm (2.7547 ± .0019 in)

在组装后,其他六个轴承中的凸轮轴孔径 ... 69.982 ± 0.061 mm (2.7552 ± .0024 in)

(4) 新止推板的厚度 ... 4.65 ± 0.03 mm (.183 ± .001 in)

凸轮轴轴向间隙 ... 0.090 to 0.270 mm (.0035 to .0106 in)




图 2g00489224

(5) 凸轮轴凸轮高度

(6) 凸轮轴凸轮升程

排气凸轮 ... 10.210 mm (.4020 in)
进气凸轮 ... 10.212 mm (.4021 in)

按照以下步骤得出实际凸轮轴凸轮升程。

  1. 测量凸轮轴凸轮高度 (5) 。

  1. 测量基圆 (7) 。

  1. 从凸轮轴凸轮高度值中减去基圆。 二者之差即为实际凸轮升程 (6) 。

新凸轮的实际凸轮高度和规定凸轮高度的最大可允许差值 ... 0.13 mm (.005 in)

Caterpillar Information System:

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