HOSE AS 2531248 - Caterpillar

If necessary, follow Step 15.a through Step 15.b to remove fuel connection and the connections for the coolant from the ARD combustion head.
Remove fuel connection (24) from ARD combustion head (9).
Remove O-ring seal (23) from connection (24).
Remove coolant connection (19) and coolant connection (21) from ARD combustion head (9).
Remove O-ring seal (20) (not shown) from coolant connection (19).
Remove O-ring seal (22) (not shown) from coolant connection (21).
Illustration 5 g02158585
If necessary, remove studs (26) from body (25) of the ARD.Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-5597 Anti-Seize Compound 1
B - Bostik Pure Nickel
Anti-Seize Compound 1
C 247-5377 Torque Wrench 1
Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
Illustration 6 g02158585
If necessary, install studs (26) to ARD body (25). Apply Tooling (A) onto the threads of studs (26). Install the studs to body (25) of the ARD.Tighten studs (26) to a torque of 17 N m (150 lb in).
Illustration 7 g02158584
If necessary, follow Step 3.a through Step 3.d to install the fuel connection and the connections for the coolant to the ARD combustion head.
Ensure that the filter in fuel connection (24) is clean and free from damage. Ensure that the filter in the combustion head (9) is clean and free from damage.
Install a new O-ring seal (23) to fuel connection (24). Install the connection to ARD combustion head (9). Tighten the connection to a torque of 60 N m (44 lb ft).
Install a new O-ring seal (20) (not shown) to coolant connection (19). Install coolant connection (19) to ARD combustion head (9). Tighten the connections to a torque of 30 N m (266 lb in).
Install a new O-ring seal (22) (not shown) to coolant connection (21). Install coolant connection (21) to ARD combustion head (9). Tighten the connections to a torque of 30 N m (266 lb in).
Illustration 8 g02158582
Illustration 9 g02158581
Thoroughly clean the gasket surfaces of the ARD combustion head, combustion tube assembly, and the ARD body. Do not damage the gasket surfaces of the combustion head of the ARD body. Ensure that no debris enters the assembly of the clean emission module.
Install a new gasket (16) and install combustion tube assembly (17). Install a new gasket (18).
Install ARD combustion head (9).
Apply Tooling (A) onto the threads of the studs and nuts (15). Install nuts (15) to ARD combustion head (9).
Tighten nuts (15) in a crisscross pattern to a torque of 23 N m (204 lb in). Tighten nuts (15) again in a crisscross pattern to a torque of 28 N m (248 lb in). Tighten nuts (15) again in a crisscross pattern to a torque of 28 N m (248 lb in).
Install spark plug (14) to ARD combustion head (9). Tighten spark plug (14) to a torque of 57.5 4 N m (42 3 lb ft). Refer to Disassembly and Assembly, "ARD Spark Plug - Remove and Install" for the correct procedure.
Illustration 10 g02158579
Install a new gasket (8) (not shown). Install allen