Land Rover Defender 300tdi Workshop 3rd Edition Rover Manual

19FUEL SYSTEM
4
DESCRIPTION AND OPERATION
110/130 TWIN TANK FUEL SYSTEM - 5 DOOR
VEHICLES
1.Fuel filter
2.Supply pipe, lift pump to filter
3.Supply pipe, filter to injection pump
4.Fuel injection pump
5.Fuel lift pump
6.Spill return pipe, injection pump to change-over
tap
7.Supply pipe, fuel tank change-over tap to lift
pump
8.Spill return pipe, change-over tap to side tank
9.Change-over tap, spill return
10.Fuel filler cap
11.Side fuel tank12.Supply pipe, side tank to sedimentor
13.Sedimentor, if...

FUEL SYSTEM
5
DESCRIPTION AND OPERATION
110/130 TWIN TANK FUEL SYSTEM - 2 DOOR
VEHICLES
1.Fuel filter
2.Supply pipe, fuel lift pump to filter
3.Supply pipe, filter to injection pump
4.Injection pump
5.Fuel lift pump
6.Spill return pipe, injection pump to change-over
tap
7.Supply pipe, fuel tank change-over tap to lift
pump
8.Side fuel tank
9.Spill return pipe, change-over tap to side tank
10.Change-over tap, spill return
11.Supply pipe, side tank to sedimentor
12.Fuel filler pipe13.Breather pipe...

19FUEL SYSTEM
6
DESCRIPTION AND OPERATION
TWIN TANK FUEL CHANGE - OVER MECHANISM
1.Change-over tap, fuel tanks
2.Fuel supply, side tank
3.Fuel supply, rear tank
4.To fuel lift pump
5.Change-over tap, spill return
6.Spill return, side tank
7.Spill return, rear tank8.Spill return, injection pump to change-over tap
9.Control rod, operating lever to fuel change-over
tap
10.Control rod, change-over lever to spill return
pivot bracket
11.Fuel tank change-over switch
12.Control lever 

FUEL SYSTEM
7
DESCRIPTION AND OPERATION
FUEL SYSTEM COMPONENT LOCATION
1.Fuel filter bleed screw
2.Fuel filter
3.Turbocharger
4.Actuator
5.Air cleaner
6.Fuel injector7.Heater plug
8.Heater plug controller
9.Coolant temperature transmitter
10.Fuel injection pump
11.Fuel lift pump
12.Intercooler 

19FUEL SYSTEM
8
DESCRIPTION AND OPERATION
EGR FUEL SYSTEM COMPONENT LOCATION, (when fitted)
1.EGR modulator valve
2.Electrical harness plug
3.Vacuum spill pipe, modulator to air cleaner hose
4.Vacuum pipe, brake servo hose to modulator
valve
5.T piece connector
6.Vacuum pipe, vacuum pump to brake servo7.EGR valve
8.Vacuum pipe, modulator valve to EGR valve
9.Multi-plug connector, EGR valve
10.EGR control unit (fixed on base of centre seat or
cubby box)
11.EGR throttle position sensor 

FUEL SYSTEM
9
DESCRIPTION AND OPERATION OPERATION
Diesel engines operate by compression ignition. The
rapid compression of air in the cylinder during the
compression cycle heats the air and when fuel is
injected into the heated air, it ignites instantaneously.
During cold tarting, automatically controlled heater
plugs assist in raising the temperature of the
compressed air to ignition point.
A cold start advance unit advances the injection timing
to further assist starting. Idle quality is improved by...

19FUEL SYSTEM
10
DESCRIPTION AND OPERATION Under varying engine speed and load condition the
control unit sends a signal to open the vacuum
modulator which allows a vacuum to be applied above
the EGR diaphragm. The vacuum supply is taken from
a T connector in the brake servo hose. This process
is controlled by an engine speed/load map stored in
the EGR control unit memory.
Engine speed is measured by monitoring the
waveform present on one phase of the generator.
Throttle position is measured via a sensor...

FUEL SYSTEM
1
ADJUSTMENT THROTTLE CABLE
Adjust
1.Slacken throttle cable adjustment ferrule.
2.Hold throttle lever in fully closed position.
3.Adjust outer cable, by rotating ferrule, to give
1,57 mm (1/16 in) of deflection in the inner cable.
4.Check that throttle opens fully when the throttle
is depressed.EGR THROTTLE POSITION SENSOR
Check
1.Run engine until normal operating temperature is
reached.
2.Switch off engine and disconnect throttle position
sensor multi-plug.
3.Connect an Ohmmeter across pins...

19FUEL SYSTEM
2
ADJUSTMENT LOW AND HIGH IDLE SPEED ADJUSTMENT
NOTE: The high idle speed (cold start idle)
is automatically set by the setting of the
low idle speed and cannot be adjusted
individually.
1.Check and adjust throttle cable.
See Throttle
cable
2.Start engine and run it until normal operating
temperature is reached.
3.Using a suitable tachometer, check the engine
idle speed,
See ENGINE TUNING DATA,
Information, 300Tdi
4.If adjustment is necessary, first slacken the
locknut on injection pump....

FUEL SYSTEM
3
ADJUSTMENT INJECTION PUMP TIMING - CHECK AND ADJUST
Service repair no - 19.30.01
1.Viewing the valve mechanism through oil filler
aperture, turn crankshaft clockwise until inlet
valve of No.1 cylinder has just closed. No.1
cylinder is now just before TDC.
2.Remove blanking plug from flywheel housing
and insert timing toolLRT-12-044, locating
centre pin on flywheel.
NOTE: A chassis undertray may be fitted
on some vehicle derivatives to conform to
legal requirements. When under chassis...