C4.4 Engines for Caterpillar Built Machines Caterpillar


Diesel Exhaust Fluid Tank - Flush

Usage:

AP500F 449

所需工具

表 1
所需工具 
工具  零件号  零件描述  数量 
385-1861  塞 

冲洗步骤

  1. 将钥匙开关转到断开位置。 钥匙开关必须断开以使 DEF 泵排净,确保系统中没有增压的 DEF。

    注: 在某些情况下,将蓄电池断路开关转到断开位置之前,将钥匙开关转到断开位置之后最长允许 15 分钟。 请参阅操作和保养手册, "蓄电池断路开关"的详细资料。

  2. 将现有的 DEF 从 DEF 罐中排出。

    注: 在此步骤中,必须按照当地法规和要求处置所有排放或冲洗的 DEF。

  3. 将发动机冷却液排放到能将冷却液管路从储罐集管上拆下的适当液位。 请参阅操作和保养手册以了解更多信息。


    图 1g03708638
    典型示例
    (1) DEF 吸入管路
    (2) 歧管(DEF 加热器)
    (3) 线束组件
    (4) DEF 回流管路
    (5) 供应至 DEF 泵的冷却液
    (6) 供应至 DEF 泵的冷却液(DEF 加热器)

  4. 将歧管(DEF 加热器)从 DEF 罐上拆下。 有关正确步骤,请参阅拆解和装配, "歧管(DEF 加热器)- 拆卸和安装"。


    图 2g03710736
    典型示例
    (2) 歧管(DEF 加热器)
    (7) 滤清器

  5. 将滤清器从歧管(DEF 加热器)上拆下。 有关正确步骤,请参阅拆解和装配, "歧管(DEF 加热器)- 拆卸和安装"。

  6. 使用蒸馏水冲洗歧管(DEF 加热器)上的 DEF 吸入和回流接头。 将新滤清器安装到歧管(DEF 加热器)上。 有关正确步骤,请参阅拆解和装配, "歧管(DEF 加热器)- 拆卸和安装"。

  7. 将适当的容器放置到 DEF 罐排放口下方,并彻底冲洗 DEF 罐。

  8. 将歧管(DEF 加热器)重新安装到 DEF 罐上。 有关正确步骤,请参阅拆解和装配, "歧管(DEF 加热器)- 拆卸和安装"。


    图 3g03710738
    典型示例
    (8) DEF 泵
    (9) DEF 滤清器盖

  9. 更换柴油机排气处理液(DEF)滤清器。 有关正确的步骤,请参阅操作和保养手册。

  10. 使用蒸馏水冲洗进入适当的容器的 DEF 吸入和回流管路。 蒸馏水需要的最少量为 7.57 L (2 US gal)

  11. 将所有管路重新连接至 DEF 泵和歧管(DEF 加热器)。 请参阅拆解和组装以了解正确步骤。

  12. 用新的 DEF 将 DEF 罐加注到适当的液位。 操作和保养手册的更多信息。 新的 DEF 必须符合 ISO 22241 标准。

  13. 起动发动机。 有关正确的步骤,请参阅操作和保养手册。

  14. 连接电子维修工具。

  15. 在电子维修工具中进行"后处理系统功能测试"。 该测试将确认冲洗和更换滤清器之后 DEF 系统是否正常工作。

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