PISTON 9N1605 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 370-8376 Cap Kit 1
Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, "General Hazard Information and High-Pressure Fuel Lines" for safety information.Refer to System Operation, Testing and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.
Turn the fuel supply to the OFF position.
Turn the battery disconnect switch to the OFF position.
Illustration 1 g06226268
Make temporary identification marks on plastic tube assemblies to show the correct position of the plastic tube assemblies.
Place a suitable container below the fuel filter base to catch any fuel that might be spilled.
Disconnect plastic tube assembly (1), plastic tube assembly (2), and plastic tube assembly (3) from the fuel filter base. Use Tooling (A) to plug the plastic tube assemblies with new plugs. Use Tooling (A) to cap the ports in the fuel filter base with new caps.
If necessary, disconnect Original Equipment Manufactures (OEM) harness assembly from harness assembly (4) for the differential pressure switch.
Illustration 2 g06226269
Remove filter (7) from canister (8). Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.
Remove bolts (5) from fuel filter base (6). Remove fuel filter base (6) from the mounting bracket.Note: Do not disassemble the fuel filter base.
If necessary, follow Step 9.a through Step 9.b to remove differential pressure switch (10) from fuel filter base (6).
Remove differential pressure switch (10) from fuel filter base (6).
Remove O-ring seal (9) (not shown) from differential pressure switch (10).Installation Procedure
Install fuel filter base (6) in the reverse order of removal.
Tighten differential pressure switch (10) to a torque of 20 N m (177 lb in).
Tighten bolts (5) to a torque of 44 N m (32 lb ft).