440 and 450 Backhoe Loaders Monitoring System Caterpillar


General Information

Usage:

440 DC9
对监控系统进行故障诊断和排除需要参考机器维修手册的更多信息。 可能需要的其他手册为维修手册、系统示意图、零件手册和操作和保养手册。

本手册结尾含有一幅典型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,请参阅维修手册中的 电气系统示意图。

当故障诊断和排除步骤指导您"修理线束"时,使用正在维修机器的电气系统示意图来追踪电路。 在线束接头上执行持续性检查,以便找到线束故障。

务必检查部件接头上的接地电路。 接头的接地触针与机架接地之间的电阻应小于 5 欧姆。 大于五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。 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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