Auxiliary Fuel Tank

Figure 3-35: Auxiliary Fuel Tank Components:

AUXILIARY FUEL TANK

Removal
1. Drain auxiliary fuel tank. Drain tank with air powered portable drain equipment.
2. Remove tank filler neck housing from wheel house.
3. Remove bolts attaching auxiliary tank fuel filler neck and housing to body.
4. Disconnect filler neck at tank and vent line at housing.
5. Support auxiliary tank with floor jack positioned under tank skid plate.

NOTE: Do not loosen or remove the bolts attaching the tank to the skid plate. The tank and skid plate will be removed as an assembly.

6. Remove bolts and nuts attaching tank skid plate to left and right frame brackets and rear crossmember.
7. Lower tank enough to reach fuel lines. Then disconnect fuel lines, fuel level transmitter wires, and vent line. Mark lines and wires for assembly reference.

NOTE: The fuel supply and return lines are equipped with quick connect fittings. To disconnect, first lift and remove the fitting retainer from each fitting. Then pull the fittings free of the tank fuel tubes.

8. Lower the jack and remove the tank from under the vehicle.

Figure 3-34: Fuel Tank and Components:

9. Replace fuel level transmitter and access plate (Figure 3-34).

Installation
1. If new tank is being installed, transfer tank skid plate to new tank.
2. Place tank on floor jack and position it under vehicle.
3. Raise tank enough to reach feed lines.
4. Attach vent line and fuel level transmitter wires.
5. Connect fuel lines. Push each line onto tank tube. Secure lines with retainers. Be sure retainers are firmly seated in line fittings.
6. Raise and align tank skid plate with frame brackets and rear crossmember.
7. Install tank attaching bolts and nuts and tighten securely.
8. Install filler tube housing and fuel filler cap.
9. Install filler tube shield in wheelhouse.
10. Refill fuel tank.
11. Verify tank operation and fuel level reading.