C175-16 PETROLEUM ENGINES Caterpillar


Bearing Clearance - Check

Usage:

C175-16 P5P

测量步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
198-9142  塑料量规(绿色)
0.025 至 0.076 mm
(0.001 至 0.003 in) 
198-9143 塑料量规(红色)
0.051 至 0.152 mm
(0.002 至 0.006 in) 
198-9144 塑料量规(蓝色)
0.102 至 0.229 mm
(0.004 至 0.009 in) 
198-9145 塑料量规(黄色)
0.230 至 0.510 mm
(0.009 至 0.020 in) 

注: 当发动机安装在底盘上时,可能不需要塑料量规。


注意

保持所有零件清洁无杂质。

杂质会造成快速磨损並縮短部件使用寿命。


注: Caterpillar 不推荐检查实际的轴承间隙,尤其是在小型发动机上。 这是因为可能会出现结果不准确,轴承或轴径可能被损坏。 每个 Caterpillar 发动机轴承都要进行特殊的壁厚质量检查。

注: 测量值应在技术规格内且必须使用正确的轴承。 如果在解体期间测量了缸体和连杆的曲轴轴颈和孔,则不需要做进一步检查。 然而,如果技师仍然想要测量轴承间隙,使用工具 (A) 也是可以测量的。 如果间隙小于 0.10 mm (0.004 in),工具 (A) 对于小直径轴颈测量的准确度将会打折扣。


注意

导线、塞尺或量缸表可能会损坏轴承面。


技师必须非常仔细正确地使用工具 (A)。 必须记住以下要点:

  • 确保轴承和孔的后面清洁和干燥。

  • 确保轴承锁片正确就位于锁片槽内。

  • 曲轴与工具 (A) 的触点上不能沾有油。

  1. 将工具 (A) 置于盖中的轴承顶部。

    注: 不允许工具 (A) 延伸到轴承边缘外。

  2. 使用正确的转动扭矩技术规格安装轴承盖。 不要使用冲击扳手。 在安装盖时小心不要撞出轴承。

    注: 安装工具 (A) 时不要转动曲轴。

  3. 小心地拆卸盖,但不要卸掉工具 (A) 。 工具 (A) 在轴承盖或曲轴轴颈上时测量工具 (A) 的宽度。 参考图 1。


    图 1g01152855
    典型示例

  4. 安装轴承盖前拆卸全部的工具 (A)。

    注: 用工具 (A) 测得的读数有时不清晰。 例如,工具 (A) 的所有零件并不一样宽。 测量主要宽度确保零件符合技术规格。 有关正确的间隙,请参阅技术规格手册, "连杆轴承轴颈"和技术规格手册, "主轴承轴颈"。

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