Aft of Axle Fuel Tank

Steel Aft Fuel Tank Installation:

Plastic Aft Fuel Tank Installation:

REMOVAL
1. Raise the rear of the vehicle.
2. Disconnect the battery ground cable to avoid electrical sparking at the tank. Then disconnect the fuel gauge sending unit wire at the fuel tank.
3. Vehicles with dual tanks disconnect the ground wire after both tanks have been drained. Siphon the fuel from the tank into a suitable container at the fuel from the tank into a suitable container at the hose between the fuel pump and the fuel tube.
4. Loosen the fuel line hose clamps, slide the clamps forward and disconnect the fuel line at the fuel gauge sending unit.
5. If the fuel gauge sending unit needs to be removed, turn the unit retaining ring counterclockwise and remove the sending unit, retaining ring and gasket.
6. Loosen the clamp on the fuel filler pipe. Disconnect the filler pipe hose by pulling along the rubber inner tube from the tank filler neck.
7. If removing the metal-type tank, support the tank and remove the bolts attaching the tank supports to the frame. Lower the tank and disconnect the vent tube from the vapor emission control valve in the top of the tank. Finish removing the filler pipe and filler pipe vent hose if not possible in previous step. Remove the tank from under the vehicle.
8. If removing the plastic-type tank, support the tank and remove the bolts attaching the combination skid plate and tank support to the frame. Lower the tank and disconnect the vent tube from the vapor emission control valve in the top of the tank. Remove the skid plate and tank from under the vehicle. Disassemble the skid plate from the tank.



INSTALLATION
1. Install new support strap insulation as required.

2. If installing the plastic-type tank, assemble the skid plate and support straps to the tank.
3. Raise the tank skid plate and support assembly and attach the vent hose to the vapor emission control valve.
4. Start the tank neck into the hose.
5. Position the tank assembly against the top straps or the frame. Install the attaching bolts and nuts using thread adhesive.
NOTE: The plastic tank attaching bolts and nuts do not utilize thread adhesive. See SPECIFICATIONS.
6. Insert the rubber inner tube inside the tank filler neck and connect the filler pipe hose.
7. If the fuel gauge sending unit was removed, ensure all the old gasket material has been removed from the unit mounting surface on the tank. Using a new gasket, position the fuel gauge sending unit to the fuel tank and secure with the retaining ring.
8. Connect the fuel gauge sending unit wire to the sending unit.
9. Connect the fuel line at the fuel gauge sending unit and tighten the clamps securely. Install the drain plug, if so equipped.
10. Connect the vehicle battery ground cable removed in Step 2.
11. Fill the tank and check all connections for leaks.
12. Lower the vehicle.