Cummins ISX11.9 CM2250 – Service Manual 011-076   Aftertreatment SCR Catalyst Temperature Sensor Interface Module Mounting Bracket

WARNING  The exhaust and exhaust components can remain hot after the vehicle stopped moving. To reduce the risk of fire, property damage, burns or other serious personal injury, allow the exhaust system to cool before beginning this procedure or repair and make sure that no combustible materials are located where they are likely to come in contact with hot exhaust or exhaust components.

CAUTION  The catalyst elements contained in the aftertreatment system are made of brittle material. Do not drop or strike the side of the aftertreatment system, as damage to the catalyst element can result.

NOTE: Due to the number of different exhaust aftertreatment applications, this procedure has been written to be generic. Not all illustrations within this procedure will represent the application being serviced.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

CAUTION  The aftertreatment diesel particulate filter and catalyst can remain hot for long periods of time after the engine has stopped.

• Disconnect the batteries. Refer to the OEM service manual.
• Disconnect the aftertreatment exhaust gas temperature sensors from the aftertreatment selective catalytic reduction (SCR) catalyst temperature sensor interface module. Refer to Procedure 019-449 in Section 19.
• Mark the orientation and location of the bracket before it is removed, to aid installation.

NOTE: The aftertreatment SCR catalyst temperature sensor interface module must be oriented in the same location when it is installed.  Pay special attention to this orientation.

Remove the nut on the aftertreatment SCR catalyst temperature sensor interface module mounting bracket strap.

Remove the aftertreatment SCR catalyst temperature sensor interface module from the sensor table.

Inspect the aftertreatment SCR catalyst temperature sensor interface module mounting bracket for cracks, damaged threads, or broken studs.

Replace the aftertreatment SCR catalyst temperature sensor interface module mounting bracket if damaged.

Inspect the aftertreatment SCR catalyst temperature sensor interface module mounting bracket strap for cracks, damaged threads, or bends.

Replace the aftertreatment SCR catalyst temperature sensor interface module mounting bracket strap if it is damaged.

NOTE: Make sure the aftertreatment SCR catalyst is oriented so the aftertreatment SCR catalyst temperature sensor interface module is installed in the same orientation noted during removal.

Install and tighten the aftertreatment SCR catalyst temperature sensor interface module onto the sensor table.

Install the aftertreatment SCR catalyst temperature sensor interface module mounting bracket and strap. Be sure to align the mounting bracket  by using the reference mark that was made during removal.

Apply a coating of anti-seize compound to the threads of the aftertreatment diesel particulate filter differential pressure sensor mounting bracket strap.

Install the nut on the aftertreatment SCR catalyst temperature sensor interface module.

Tighten the aftertreatment SCR catalyst temperature sensor interface module bracket.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Connect the aftertreatment exhaust gas temperature sensors from the aftertreatment SCR catalyst temperature sensor interface module. Refer to Procedure 019-449 in Section 19.
• Connect the batteries. Refer to the OEM service manual.
• Operate the engine and check for proper operation.