BUSHING-ECC 4528793 - Caterpillar

Removal Procedure
Ensure that the ammonia sensor is not dropped or knocked. If the ammonia sensor, has been dropped or knocked the ammonia sensor must be replaced as an assembly.
Turn the battery disconnect switch to the OFF position.
Illustration 1 g03730069
Cut cable straps (3) from harness assembly (9). Ensure that all the cable straps are removed from the harness assembly. Refer to the Original Equipment Manufacture (OEM) for the correct location and the correct removal procedure. Note: Ensure that the harness assembly is not damaged as the cable straps are cut.
Disconnect harness assembly (9) from control module (4).
Remove ammonia sensor (2) from OEM tube assembly (1). Ensure that harness assembly (9) is not damaged as the ammonia sensor is removed. Place the probe of the ammonia sensor in a plastic bag and secure the plastic bag with a cable strap. Ensure that the ammonia sensor sensing element is not contaminated.
If necessary, follow Step 6.a through Step 6.c to remove the ammonia sensor control module (4) from bracket (7).
Disconnect the OEM harness assembly from connection (8).
Remove bolts (5) and washers (6) from control module (4). Support the control module as the bolts are removed.
Remove control module (4) and harness assembly (9) from bracket (7). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Bostik Pure Nickel
Anti-Seize Compound 1
B - 22 mm Crows Foot 1
Ensure that the ammonia sensor is free from wear or damage. Replace the ammonia sensor as an assembly if worn or damaged.
Check the threads of the mounting point for ammonia sensor in the OEM tube assembly for wear or damage. Replace the OEM tube assembly if the mounting point is worn or damage. Refer to the OEM for the correct procedure.
Illustration 2 g03730069
If necessary, follow Step 3.a through Step 3.d to install the ammonia sensor control module (4) from bracket (7).
Position control module (4) onto bracket (7). Ensure that the control module is correctly oriented onto the bracket.
Install washers (6) and bolts (5) to control module (4). Support the control module as the bolts are installed.
Tighten bolts (5) to a torque of 12 N m (106 lb in).
Connect the OEM harness assembly to connection (8).
Lightly lubricate the thread of ammonia sensor (2) with Tooling (A).
Remove the probe of ammonia sensor (2) from the plastic bag. Install the ammonia sensor to OEM tube assembly (1). Ensure that harness assembly (9) is not damaged as the ammonia sensor is installed. Note: Ensure that the ammonia sensor sensing element is not contaminated.
Use Tooling (B) to tighten ammonia sensor (2) to a torque of 50 N m (37 lb ft).
Install new cable straps (3) to harness assembly (9). Ensure that all the cable straps are installed onto the harness assembly. Refer to the OEM for the correct location and the correct installation procedure. Note: Ensure that the cable straps meet OEM specifications.
Turn the battery disconnect switch to the ON position.