F 550 4WD Super Duty V8-6.4L DSL Turbo (2008)
Auxiliary Fuel Tank (Part 2)
Removal and Installation
WARNING: When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be
ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.
NOTE: Some residual fuel may remain in the fuel tubes after releasing the fuel system pressure. Upon disconnecting or removing any fuel tubes,
carefully drain any residual fuel into a suitable container.
All vehicles
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Release the fuel system pressure.
Midship and auxiliary fuel tank equipped vehicles
3. Remove the fuel tank.
Aft-of-axle fuel tank equipped vehicles
4. Disconnect the fuel supply tube-to-fuel level sensor quick connect coupling and the fuel return tube-to-fuel level sensor quick connect coupling.
All vehicles
5. Disconnect the fuel supply tube-to-engine fuel supply tube spring lock coupling and the fuel return tube-to-engine fuel return tube spring lock
coupling.
6. Disconnect the fuel supply tube-to-fuel conditioning module spring lock coupling and the fuel return tube-to-fuel conditioning module spring lock
coupling.
7. Disconnect the fuel supply tube-to-fuel conditioning module quick connect coupling and the fuel return tube-to-fuel conditioning module quick
connect coupling.
8. Disconnect the fuel supply tubes and fuel return tubes from the position retainers and remove from the vehicle.
9. To install, reverse the removal procedure.