Disassembly/reassembly

DISASSEMBLY/REASSEMBLY

1. Using tool no. 1.822.135.000, remove the lock ring, then withdraw the submerged pump assembly complete with level gauge control from the tank.
2. Remove the multi-function valve complete with pipe from the fuel tank.

SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL

This mainly comprises:

• an electric pump of the type with pins
• a fuel level gauge
• a fuel filter.

ELECTRIC FUEL PUMP

The electric pump submerged in the fuel is of the volumetric type with pins, with motor with brushes and with permanent magnet energising.

The impeller (1) turns, drawn by the motor, creating volumes which move from the inlet port (2) to the delivery port (3).

These volumes are delineated by the pins (4) which adhere to the outer ring (5) while the motor turns.

The pump is fitted with two valves, a non-return one to prevent the fuel circuit from emptying (with pump stopped) and the second one is an overpressure valve (6), which re-circulates delivery with the intake when the pressure exceeds 5 bar.

1. Impeller
2. Intake port
3. Delivery port
4. Pins
5. Outer ring
6. Overpressure valve

REMOVAL/REFITTING

• Make sure that the ignition key is in the «STOP» position, then disconnect the battery (-) terminal.
• Working from the boot, tilt the rear seat back and move aside the trim.