HOSE AS 2504523 - Caterpillar

Removal Procedure
Illustration 1 g02917036
Illustration 2 g02915178
Slide the locking tab into the unlocked position and disconnect harness assembly (3) from exhaust back pressure sensor (5).
Using a deep socket in order to remove exhaust back pressure sensor (5) from adaptor bracket (7).
Remove O-ring (6) (not shown) from exhaust back pressure sensor (5).
If necessary, follow Step 4.a through Step 4.j in order to remove tube assembly (6).
If necessary, remove the diesel particulate mounting bracket. Refer to Disassembly and Assembly, "Support and Mounting (CEM) - Remove and Install" for the correct procedure.
If necessary, remove the exhaust gas recirculation cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install" for the correct procedure.
If necessary, remove the exhaust gas temperature sensor. Refer to Disassembly and Assembly, "Temperature Sensor (Exhaust) - Remove and Install" for the correct procedure.
Disconnect harness assembly (4) from the retaining clip.
Loosen nut (8) and disconnect tube assembly (9).
Remove bolt (2) and remove adaptor bracket (7) from the induction manifold.
Remove banjo bolt (10) from tube assembly (9).
Remove bolt (1) from the bracket for tube assembly (9).
Remove tube assembly (9) from the exhaust manifold.
Remove and sealing washers (11) (not shown). Installation Procedure
Check all components for wear and damage. If necessary, replace any components that are worn or damaged.
Illustration 3 g02915178
Illustration 4 g02917036
If necessary, follow Step 2.a through Step 2.i in order to install tube assembly (6).
Install a new sealing washer (11) (not shown) to banjo bolt (10).
Install banjo bolt assembly (10) into tube assembly (9). Install the remaining new sealing washer (11) (not shown) to banjo bolt assembly (10).
Install tube assembly (9) onto the exhaust manifold and exhaust back pressure sensor bracket (7). Tighten banjo bolt assembly (10) finger tight.
Install bolt (1) to the bracket for tube assembly (6).
Position adaptor bracket (7) onto the induction manifold and install bolt (2).
Tighten nut (8) finger tight.
Tighten bolt (1) and bolt (2) to a torque of 25 N m (221 lb in).
Tighten banjo bolt (10) to a torque of 15 N m (133 lb in).
Tighten nut (8) to a torque of 15 N m (133 lb in).
Install new O-ring seal (6) (not shown) to exhaust back pressure sensor (5).
Install exhaust back pressure sensor (5). Tighten the sensor to a torque of 15 N m (133 lb in)
Connect harness assembly (3) to exhaust back pressure sensor (5) and slide the locking tab into the locked position.
If necessary, install the exhaust gas temperature sensor. Refer to Disassembly and Assembly, "Temperature Sensor (Exhaust) - Remove and Install" for the correct procedure.
If necessary, install the exhaust gas recirculation cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install" for the correct procedure.
If necessary, install the diesel particulate mounting bracket. Refer to Disassembly and Assembly, "Support and Mounting (CEM) - Remove and Install" for the correct procedure.
Install harness assembly (4) onto exhaust back pressure sensor bracket (7).
Install bolt (2) to exhaust back pressure sensor (4). Tighten the bolt to a torque of 25 N m (221 lb in).