3054 Engine Caterpillar


Compression - Test

Usage:

554 1AM

技术规格

表 1
压缩技术规格    
气缸中的压力    
2450 至 2950 kPa (355.3480 至 427.8680 psi) @ 250 rpm    

简介

只能使用气缸压缩压力测试来比较一台发动机的各个气缸。 转速为 250 rpm 时,气缸压力应介于 2450 至 2950 kPa (355.3480 至 427.8680 psi)。 如果一个或多个气缸的差值超过 350 kPa (51 psi),则可能需要修理该气缸及其相关部件。

不应只使用压缩压力测试来确定发动机的状况。 还应进行其他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。

  • 所有喷油嘴已拆下。

  • 已断开供油管。

测试步骤

  1. 将气缸压力测量表安装在喷油嘴的孔中。

  1. 操纵起动马达来转动发动机。 记录压缩压力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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