C4.4 Industrial Engine Caterpillar


Fuel Filter Base - Remove and Install - Twin Secondary Fuel Filter

Usage:

C4.4 448

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
370-8376  Cap Kit 


NOTICE

Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training.

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.



NOTICE

Care must be taken to ensure that fluids 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.


  1. Turn the fuel supply to the OFF position.

  2. Turn the battery disconnect switch to the OFF position.

  3. Drain the secondary filters. Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.


    Illustration 1g02597024

  4. Make temporary identification marks on all the plastic tube assemblies in order to show the correct position of the tube assemblies.

  5. Place a suitable container below the fuel filter base in order to catch any fuel that might be spilled.

  6. Disconnect plastic tube assembly (1), plastic tube assembly (2), and plastic tube assembly (5) from fuel filter base (3).

  7. Remove plastic tube assembly (1), plastic tube assembly (2), and plastic tube assembly (5) from clips (4).

  8. Use Tooling (A) in order to plug the plastic tube assemblies with new plugs. Use Tooling (A) in order to cap the ports in the fuel filter base with new caps.


    Illustration 2g02597038

  9. Remove secondary filters (8) from canisters (9). Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.

  10. Remove bolts (6) and bolts (7) from fuel filter base (3). Remove the fuel filter base from the mounting bracket.

    Note: Do not disassemble the fuel filter base.



    Illustration 3g02597063

  11. If necessary, follow Step 11.a through Step 11.c in order to remove the bracket for secondary fuel filter.

    1. Cut cable strap (10) and cable strap (11) from harness assembly (12).

    2. Remove bolts (11), bolts (12) and bolt (16) from fuel filter bracket (10).

      Note: Note position of different length bolts.

    3. Remove fuel filter bracket (10) from the NRS induction mixer assembly.

Installation Procedure


NOTICE

Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training.

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.




    Illustration 4g02597063

  1. If necessary, follow Step 1.a through Step 1.d in order to install the bracket for secondary fuel filter.

    1. Position fuel filter bracket (10) onto the NRS induction mixer assembly.

    2. Install bolts (11), bolts (12) and bolt (16) to fuel filter bracket (10).

    3. Tighten bolts (11), bolts (12) and bolt (16) to a torque of 22 N·m (195 lb in).

    4. Install new cable strap (10) and cable strap (11) to harness assembly (12).

      Note: Ensure that the cable straps meet the Original Equipment Manufactures (OEM) specification.



    Illustration 5g02597038

  2. Ensure that fuel filter base (3) is clean and free from damage. If necessary, replace the complete fuel filter base and filter assembly.

  3. Position fuel filter base (3) on the mounting bracket. Install bolts (6) and bolts (7). Tighten the bolts to a torque of 44 N·m (32 lb ft).

  4. If necessary, install new fuel filters (8) to canisters (9). Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.


    Illustration 6g02597024

  5. Remove the plugs from the plastic tube assemblies. Remove the caps from the ports in the fuel filter base.


    NOTICE

    Ensure that the plastic tube assemblies are installed in the original positions. Failure to connect the plastic tube assemblies to the correct ports will allow contamination to enter the fuel system. Serious damage to the engine will result if contaminated fuel enters the fuel system.


  6. Connect plastic tube assembly (1), plastic tube assembly (2), and plastic tube assembly (5) to fuel filter base (3).

  7. Install plastic tube assembly (1), plastic tube assembly (2), and plastic tube assembly (5) to clips (4).

  8. Turn the fuel supply to the ON position.

  9. Turn the battery disconnect switch to the ON position.

End By:

  1. Remove the air from the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.

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