General Information
可通过 Cat® 监控系统或 Cat® 电子技师 (Cat ET) 访问电子控制模块 (ECM) 的诊断。 对系统进行故障排除时需要使用来自其他机器维修手册的更多信息。 In addition to the Troubleshooting Manual, each machine comes with the following manuals:
- Operator and Maintenance Manual
- 拆解和组装
- Systems Operations
- 测试和调整
- 技术规格
- 液压示意图
- 电气示意图
Other types of literature applicable to the machines such as Service Letters and Special Instructions are also available.
- To access the manuals, go to SIS web (https://sis.cat.com) and enter the serial number prefix for the machine into the "Serial Number or Prefix" field on the web page.
注: The serial number prefixes for the applicable machines are listed on the cover of this manual.
- Then select "Documentation". All of the literature available to that machine will be listed.
本手册结尾含有一幅简化的系统示意图作为指南。 有关正在诊断的机器的准确示意图,参考上面列出的适用于正在维修的机器的电气系统示意图。
当故障诊断和排除步骤指出需要“修理线束或更换线束”时,请使用正在维修的机器的电气系统示意图来追查电路。 执行线束接头的导通性检查,确定线束故障位置。 务必检查部件接头上的接地电路。 接头的接地触点与机架接地之间的电阻应小于 5 欧姆。 ECM 电源电路在接地接头触点与机架接地之间的电阻应小于 2 欧姆。 为确保正常工作,信号电路的电阻应小于 5 欧姆。 大于 5 欧姆的过大接地电阻会导致故障诊断发生错误。
故障诊断和排除过程中,在更换任何部件之前应先检查所有连接。 如果这些连接不清洁、不牢固,则可能会导致永久性电气故障或间歇性电气故障。 检查并确认已将导线完全推入接头中。 在进行其它测试之前,确保所有连接牢固。
一个电气部件的故障可能会导致其他部件出现故障。 同样,一个电气部件的故障可能是由其他部件的故障引起的。 在更换部件之前,务必先尝试排除电气系统故障的原因。
Caterpillar Information System:
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