Note: A new sealing O-ring will be required for refitting.

Removal

1 Disconnect the battery negative terminal.
2 Depressurise the fuel system of Fiat Punto.
3 Lift up the rear seat cushion and the floor covering for access to the fuel pump cover.
4 Undo the three screws and lift the cover from the aperture in the floor panel (see illustration).



Remove the fuel pump cover from the aperture in the floor panel


5 Release the locking catch and disconnect the wiring connector from the top of the fuel pump of Fiat Punto (see illustration).



Release the locking catch and disconnect the wiring connector from the fuel pump


6 Disconnect the fuel supply line quick-release fitting from the pump unit by pressing the tabs (see illustration). Plug the end of the supply line or cover it with adhesive tape.



Disconnect the fuel line quick-release fitting by pressing the tabs


7 Unscrew the large locking ring and remove it from the tank. This is best accomplished by making up a simple tool from two strips of metal, suitably drilled and batted together with two lengths of threaded bar and locknuts. Engage the tool with the ribs of the locking ring, and turn the ring anti-clockwise until it can be unscrewed by hand (see illustrations).



Using a home-made tool, slacken the fuel pump locking ring …



... then remove the ring from the tank


8 Lift the fuel pump and sender unit assembly of Fiat Punto out of the fuel tank, taking great care not to damage the float arm. Recover the sealing 0-ring and discard it - a new one must be used on refitting (see illustrations).



Lift the fuel pump and sender unit assembly out of the fuel tank...



... and recover the sealing O-ring


9 Note that the fuel pump and sender unit is only available as a complete assembly - no components are available separately.

Refitting

10 Refitting is a reversal of the removal procedure using a new sealing ring. Prior to refitting the access cover, reconnect the battery, then start the engine and check the fuel line for signs of leakage.