C7.1 Industrial Engine and Generator Set Caterpillar


Welding Precaution

Usage:

C7.1 770
需要正确的焊接步骤来避免损坏下述部件:

  • 发动机电子控制模块 (ECM)

  • 清洁排放模块(CEM)

  • 传感器

  • 相关部件

也应考虑用于从动设备的部件。 如可能,拆下需要焊接的部件。 当在配备 ECM 的发动机上进行焊接而又不可能将部件拆下来时,必须遵循下述步骤。 本步骤可尽可能避免电子部件损坏。

  1. 停止发动机。 断开 ECM 的电源。

  1. 确保关断通往发动机的燃料供应。

  1. 从蓄电池上断开蓄电池负极电缆。 如果安装了蓄电池断路开关,应断开此开关。

  1. 从导线线束上断开所有电气部件。 包括下列部件:

    • 从动设备的电气部件

    • ECM

    • 传感器

    • 电子控制阀门

    • 继电器

    • 后处理 ID 模块


    注意

    切勿将电气零部件(电子控制模块或电子控制模块传感器)或电子零部件的接地点用作电焊机的接地点。





    图 1g01143634

    维修焊接指南(典型示图)

  1. 如可能,将焊接设备的接地卡箍直接连接到待焊接发动机部件上。 尽可能将夹子夹在焊接点附近。 就近定位可避免焊接电流损坏发动机轴承、电气部件和其他部件。

  1. 防止焊接碎屑和/或焊接飞溅物损坏导线线束。

  1. 采用标准焊接步骤将物料焊接在一起。

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