C15 and C18 Tier 4 Final Engines Caterpillar


Aftertreatment SCR System Dosing - Test

Usage:

826K 232

所需工具

表 1
所需工具 
441-0451 套件 - 测试 
LOCTITE C-5A 铜防粘结剂 

测试步骤

  1. 将柴油机排气处理液(DEF)喷油器从柴油微粒滤清器(DPF)的出口拆下。

    注: 保持冷却液管路、DEF 管路和电气接头与 DEF 喷油器的连接。



    图 1g03370846
    用螺栓将 DEF 喷油器固定到测量容器盖上


    图 2g03370910
    441-0451 套件 - 测试 组装用于测试步骤

  2. 组装 441-0451 套件 - 测试的 DEF 收集容器。 三个螺栓和翼形螺母将 DEF 喷油器连接到收集容器盖上。

    注: 441-0451 套件 - 测试中,有 DEF 管路和电气接头的延长件(如有需要)。

  3. 将钥匙开关转到接通位置。

  4. 连接至 Caterpillar® 电子技师 (Cat ® ET)。


    图 3g03370860

  5. 单击主菜单中的 "Diagnostics(诊断)",然后单击 "Diagnostic Tests(诊断测试)"。


    图 4g03370869

  6. 单击 "DEF Dosing System Accuracy Test(DEF 喷射系统精度测试)"以继续。


    图 5g03370974

  7. 单击 "Start(开始)"执行测试。

    注: 使用 DEF 喷油器喷射检查喷射形状。 喷油器喷射形状应呈细雾状锥形。



    图 6g03370954

  8. 完成测试后,按照当地法规处置收集的 DEF。

  9. 重复测试步骤并记录收集的 DEF 量。

    喷射测试期间收集的 DEF 规格 ... 100 mL 至 130 mL

    注: 确保向 DEF 管路接头的 O 形密封圈上涂覆 DEF、蒸馏水或去离子水作为润滑剂。

  10. 使用新密封件和新密封垫组件重新安装 DEF 喷油器组件。

    注: 密封件和密封垫组件为一次性零件。

    1. 在固定 DEF 喷油器的螺栓螺纹上涂抹 LOCTITE C-5A 铜防粘结剂。

    2. 拧紧螺栓至扭矩为 5.0 ± 0.5 N·m (44 ± 4 lb in)

    3. 重新拧紧螺栓至扭矩为 5.0 ± 0.5 N·m (44 ± 4 lb in)。 额外转动 90° ± 5°。

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