Aftertreatment SCR System Dosing - Test
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所需工具 |
441-0451 套件 - 测试 |
LOCTITE C-5A 铜防粘结剂 |
- 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。
Show/hide table图 1 g03370846 用螺栓将 DEF 喷油器固定到测量容器盖上 Show/hide table图 2 g03370910 441-0451 套件 - 测试 组装用于测试步骤 - 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: 在 441-0451 套件 - 测试中,有 DEF 管路和电气接头的延长件(如有需要)。
- 将钥匙开关转到接通位置。
- 连接至 Caterpillar® 电子技师 (Cat ® ET)。
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图 3 g03370860 - 单击主菜单中的 "Diagnostics(诊断)",然后单击 "Diagnostic Tests(诊断测试)"。
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图 4 g03370869 - 单击 "DEF Dosing System Accuracy Test(DEF 喷射系统精度测试)"以继续。
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图 5 g03370974 - 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。
Show/hide table图 6 g03370954 - 完成测试后,按照当地法规处置收集的 DEF。
- 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。
- 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。
- 在固定 DEF 喷油器的螺栓螺纹上涂抹 LOCTITE C-5A 铜防粘结剂。
- 拧紧螺栓至扭矩为
5.0 ± 0.5 N·m (44 ± 4 lb in) 。 - 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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