C3.4B Engines for Caterpillar Built Machines Caterpillar


Clean Emissions Module - Remove and Install - Flywheel Mounted Diesel Oxidation Catalyst (DOC)

Usage:

CCS7 4B2

拆卸步骤

开始:

  1. 拆下 DOC 和 SCR 之间的柔性排气管。 有关正确步骤,请参阅拆解和装配, "柔性排气管 - 拆卸和安装(DOC 和 SCR 之间的柔性排气管)"。

  2. 从涡轮增压器和柴油氧化催化器 (DOC) 上拆下柔性排气管。 有关正确步骤,请参阅拆解和装配, "柔性排气管 - 拆卸和安装(来自涡轮增压器和柴油氧化催化器 (DOC) 的柔性排气管)"。

  3. 拆下柴油机排气处理液 (DEF) 喷射器。 有关正确的步骤,请参阅拆解和组装, " DEF 喷油器和安装件 - 拆卸和安装"。


    图 1g03798143

  1. 将螺栓 (2) 和螺母 (6) 从 DOC (1) 上拆下。 拆卸螺栓和螺母过程中,支承 DOC。

  2. 将 DOC (1) 从支架 (3) 和 (4) 上拆下。

  3. 如有必要,将螺柱 (5)(未显示)从 DOC (1) 上拆下。 在螺柱的图示位置做临时标记,以便于组装。

  4. 如有必要,从飞轮壳 (7) 上拆下支架 (3) 和支架 (4)。 有关正确的步骤,请参阅拆解和装配, "支架和安装件 (CEM) - 拆卸和安装(飞轮壳安装式 DOC)"。

安装步骤

  1. 确保 CEM 和支架没有磨损或损坏。 更换所有磨损或损坏的部件。


    图 2g03798143

  2. 如有必要,将支架 (3) 和支架 (4) 安装到飞轮壳 (6) 上。 有关正确的步骤,请参阅拆解和装配, "支架和安装件 (CEM) - 拆卸和安装(飞轮壳安装式 DOC)"。

  3. 如有必要,将螺柱 (5)(未显示)安装到 DOC (1) 上。 拧紧螺柱至扭矩为 11 N·m (97 lb in)

  4. 将 DOC (1) 定位到支架 (3) 和 (4) 上。 将螺栓 (2) 和螺母 (6) 安装到 DOC 上。 安装螺栓和螺母过程中,支承 DOC。

  5. 拧紧螺栓 (2) 和螺母 (6) 至扭矩为 25 N·m (221 lb in)

  6. 如果已安装新的 DOC,转至电子维修工具,并选择"维修"菜单,然后"氧化催化器更换复位"。

结束:

  1. 安装 DOC 和 SCR 之间的柔性排气管。 有关正确步骤,请参阅拆解和装配, "柔性排气管 - 拆卸和安装(DOC 和 SCR 之间的柔性排气管)"。

  2. 安装来自涡轮增压器和柴油氧化催化器 (DOC) 的柔性排气管。 有关正确步骤,请参阅拆解和装配, "柔性排气管 - 拆卸和安装(来自涡轮增压器和柴油氧化催化器 (DOC) 的柔性排气管)"。

  3. 安装柴油机排气处理液 (DEF) 喷射器。 有关正确的步骤,请参阅拆解和组装, " DEF 喷油器和安装件 - 拆卸和安装"。

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