TD5 Defender
FUEL SYSTEM
3
DESCRIPTION AND OPERATION
FUEL PUMP AND FUEL GAUGE SENDER
1. Fuel burning heater feed pipe (not used)
2. Air bleed connection (natural)
3. HP feed connection (green)
4. LP feed connection (blue)
5. LP return connection (black)
6. Pump feed pipe.
7. Spring
8. Fuel gauge sender unit
9. Swirl pot
10. Gauze filter
11. Fuel gauge sender float
12. Electrical connections
13. HP/LP two stage pump
14. Pump LP return pipe
15. Electrical connector
The fuel pump is a self priming, wet type, two stage pump, which is emersed in fuel in the tank. It operates at all
times when the ignition switch is in position ’II’. If the engine is not started, the ECM will ’time-out’ after three
minutes and de-energise the fuel pump relay.
The fuel pump assembly is retained with a locking ring and sealed with a rubber seal. The locking ring requires a
special tool for removal and refitment. The fuel gauge sender is integral with the fuel pump. The sender is
submerged in the fuel and is operated by a float which moves with the fuel level in the tank.