C3.3 Industrial Engine Caterpillar


Compression - Test

Usage:

C3.3 E3J
只能使用气缸压缩测试来比较一台发动机的各个气缸。气缸中的压力应在 300 至 500 kPa (43.5120 至 72.5200 psi)。如果一个或多个气缸的差力值超过 350 kPa (51 psi),则可能需要修理该气缸及其相关部件。

不应只使用压缩测试来确定发动机的状况。还应进行其它测试来确定是否需要调整或更换部件。

进行压缩性能测试之前,先确保存在下列条件:

  • 蓄电池状况良好。

  • 蓄电池已完全充电。

  • 起动马达工作正常。

  • 气门间隙设定值正确。

  • 已拆卸所有喷油器。

  • 已断开供油管。

  1. 将气缸压力测量表安装在喷油器的孔中。

  1. 运行起动马达来拖动发动机。记录压缩表上显示的最大压力。

  1. 对所有气缸重复步骤 1 和 2。

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