FRAME AS-UNDERCARRIAGE 1148420 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 473-2944 Capping Kit 1
B - De-ionized Water 1
Ensure that all adjustments and repairs that are carried out to the Diesel Emission Fluid (DEF) system are performed by authorized personnel that have the correct training.Before beginning ANY work on the DEF system, refer to Operation and Maintenance Manual, "General Hazard" for safety information.
Care must be taken to ensure that Diesel Emission Fluid (DEF) for the system are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Dispose of all fluids according to local regulations and mandates.
Ensure that the purge process for the DEF system is completed before turning the battery disconnect switch to the OFF position. Refer to the Operation and Maintenance Manual, "Battery Disconnect Switch" for further information.
Illustration 1 g03799260
Ensure that the area around Diesel Emission Fluid (DEF) injector (7) is clean and free dirt and debris. If necessary, clean the area around the DEF injector. Clean the area around the DEF injector with Tooling (B) and a suitable tool.
Disconnect the harness assembly from connection (3) on DEF injector (7). Use Tooling (A) to cap the harness assembly and the DEF injector.
Remove the Diesel Emission Fluid (DEF) line from connection (1) on the DEF injector (7). Refer to Disassembly and Assembly, "Diesel Exhaust Fluid Lines - Remove and Install" for the correct procedure.
Use Tooling (A) to cap connection (1) on DEF injector (7) and the DEF line.
Remove the coolant line from connection (2) and coolant line from connection (6) on DEF injector (7).
Use Tooling (A) to caps connection (2) and connection (6) on DEF injector (7).
Sufficiently loosen the Torx head bolt for V-band clamp (4) and remove DEF injector (7) and the V-band clamp from DOC (5). Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
B - De-ionized Water 1
Ensure that the DEF injector and the DOC are free from wear or damage. Replace any component that is worn or damaged.
Illustration 2 g03799267
Illustration 3 g03799260
Ensure that surfaces (8), DOC (5), and DEF injector (7) is clean and free from damage and wear.
Position V-band clamp (4) onto DEF injector (7). Ensure that the V-band clamp is correctly orientated.
Install DEF injector (7) and align with peg (9) with Slot (X) in DOC (5).
Tighten the Torx head bolt for V-band clamp (4) hand tight. Ensure that the DEF injector and the V-band clamp are correctly seated onto the DOC.
Illustration 4 g03799285
Tighten the Torx head bolt for V-band clamp (4) to a torque of 11.5 N m (102 lb in).
Remove the caps from the harness assembly and connection (3) on DEF injector (7). Connect harness assembly to the connection on the DEF injector.
Prior to the installation of the DEF supply line, follow Step 8.a through Step 8.h in order to flush the DEF supply line.
Turn the battery disconnect switch to the ON position.
Connect the electronic service tool. Refer to