88 thunderbird 5.012/20/2023 Be sure that locating keys are in keyways and seal ring remains in groove. Install fuel pump and bracket assembly carefully to insure that filter is not damaged.Put a light coating of heavy grease (Cl AZ-i 9590- B or equivalent) on a new seal ring to hold it in place during assembly and install in fuel ring groove.Clean the fuel pump mounting flange and the fuel tank mounting surface and seal ring groove.Remove fuel pump and bracket assembly.Turn the fuel pump locking ring counterclockwise with the tool and remove locking ring.Disconnect the supply line and return line fittings and the electrical connector.Remove any dirt that has accumulated around the fuel pump attaching flange so that it will not enter the tank during removal and installation.Remove fuel tank support straps and remove fuel tank to bench.Disconnect and remove fuel filler tube.Disconnect electrical connector forward of tank.Disconnect supply line and return line fittings and vent line at the right and left hand side rear axle frame kick-ups.Use care to prevent combustion from fuel spillage. Remove fuel from fuel tank by pumping out through filler.Depressurize fuel system as previously described.Remove the air cleaner and relieve system pressure by using Rotunda pressure gauge tool T80L-9974-A or equivalent and drain the system through the drain tube. A valve is provided on the throttle body for this purpose. This pressure must be relieved before servicing of the fuel system is begun. CAUTION: Fuel supply lines will remain pressurized for long periods of time after engine shut down.
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