3126B Engine for Caterpillar Built Machines Caterpillar


Engine Will Not Crank

Usage:

120H 124

可能原因

  • 蓄电池

  • 蓄电池电缆

  • 起动电路

  • 起动马达电磁阀

  • 起动马达

  • 飞轮齿圈

  • 变速箱

  • 发动机附件

  • 气缸液锁

  • 发动机内部故障

建议采取的措施

蓄电池和/或蓄电池电缆

  1. 检查主电源开关、蓄电池接线柱和蓄电池电缆连接是否松动和有无腐蚀。 如果蓄电池电缆受到腐蚀,应拆下并清洁蓄电池电缆。 拧紧所有松动的连接。

  1. 检查蓄电池。

    1. 向蓄电池充电。 请参考专门说明书, SEHS7633, "蓄电池测试步骤"。

    1. 进行蓄电池负载测试。 请参考专门说明书, SEHS9249, "6、8 和 12 伏铅酸蓄电池的 4C-4911 蓄电池负荷测试仪 的使用"。

起动马达电磁阀或起动电路

  1. 测试起动马达电磁阀的操作。

  1. 检查起动马达电磁阀的导线。

起动马达或飞轮齿圈

  1. 测试起动马达电磁阀的操作。

  1. 检查起动马达小齿轮和飞轮齿圈有无损坏。

变速器或发动机附件

  1. 确保传动系统运动自如。

  1. 确保正时销没有留在飞轮壳上。

  1. 拆下并检查任何可能会锁定发动机的发动机附件。

    以下列举了可能会锁定发动机的发动机附件的例子:

    • 由后齿轮组驱动的液压泵

    • 空气压缩机

    • 发动机机油泵

    • 其它由发动机驱动的部件

气缸液锁

拆下每一个单体喷油器,检查气缸内有无液体(气缸液锁)。

注: 排出缸盖中的燃油。 拆下单体喷油器后,燃油会从缸盖漏入气缸内。

发动机内部故障

解体发动机。 请参考解体和组装手册。 检查内部部件有无下述情况:

  • 卡住

  • 部件折断

  • 部件弯曲

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