TD5 Defender
FUEL SYSTEM
5
DESCRIPTION AND OPERATION
FUEL PRESSURE REGULATOR
NOTE: Non EU3 Model illustrated.
1. Gasket
2. Housing
3. Bolt
4. Fuel feed union and pipe
5. Fuel return union and hose
6. Fuel temperature sensor
7. Bonded seal
8. ’O’ ring
9. Circlip
10. Fuel pressure regulator
11. ’O’ ring
12. ’O’ ring
13. Gauze filter
The fuel pressure regulator is located in a cast alloy housing which is attached to the rear right hand corner of the
cylinder head with three flanged bolts and sealed with a metal gasket. Two ports in the housing connect with ports
in the cylinder head for fuel pressure feed and return. A gauze filter is located in the pressure feed port in the
cylinder head, and filters the fuel before it reaches the injectors. The filter is a fit for life item but can be changed if
required. An ’O’ ring is located in a recess in the cylinder head and provides additional sealing for the pressure
feed port between the gauze filter, the cylinder head, and the housing.
A union and pipe is attached to the feed port in the housing and connects with a quick release coupling to the fuel
pressure feed pipe from the fuel pump. A second union and hose is located in the return port and provides the fuel
return connection to the fuel cooler. A third port provides location for the fuel temperature sensor, which is sealed
to the housing with a bonded seal. The fuel temperature sensor is used by the ECM for engine management.
