3306C Engines for Caterpillar Built Machines Caterpillar


Camshaft

Usage:

D6D 01Y



图 1g01650555

注: 组装之前,用 8T-2998 润滑剂 润滑凸轮轴凸轮。

(A) 齿轮轴颈尺寸

安装新曲轴的轴承孔径 ... 58.80 ± 0.06 mm (2.315 ± 0.002 in)
新轴承与轴颈表面之间的间隙 ... 0.03 to 0.17 mm (0.001 to 0.007 in)
磨损的轴承与轴颈表面之间的最大允许间隙 ... 0.20 mm (0.008 in)
凸轮轴轴颈直径 ... 58.699 ± 0.013 mm (2.3110 ± 0.0005 in)

(B) 止推垫圈的尺寸

凸轮轴上用于新止推垫圈的槽的宽度 ... 4.83 ± 0.05 mm (0.190 ± 0.002 in)
新止推垫圈的厚度 ... 4.65 ± 0.03 mm (0.183 ± 0.001 in)
新凸轮轴的轴向间隙 ... 0.18 ± 0.08 mm (0.007 ± 0.003 in)
磨损凸轮轴的最大允许轴向间隙 ... 0.64 mm (0.025 in)



图 2g01651433

(C) 凸轮轴凸轮规定升程

排气凸轮 ... 8.382 mm (0.3300 in)
进气凸轮 ... 8.382 mm (0.3300 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 (D) 。

  1. 测量基圆 (E) 。

  1. 从凸轮高度值 (D) 中减去基圆 (E) 。 二者之差就是实际凸轮轴凸轮升程。

步骤 3 中得出的实际凸轮升程与规定的凸轮轴凸轮升程之间的最大允许差值为 0.25 mm (0.010 in)。

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