525D, 535D, 545D and 555D Wheel Skidders Caterpillar


General Information

Usage:

525D 2L5
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.

  1. 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.

  2. 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。

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