1996 LAND ROVER DEFENDER fuel pump

19FUEL SYSTEM
2
REPAIR
13.Remove banjo bolts securing spill return, main
fuel and boost signal pipes, refit banjo bolts after
disconnecting pipes.
14.Remove 2 bolts securing rear of pump to
mounting bracket.
15.Remove 3 pump securing nuts at flange and
withdraw pump and gasket.
16.Fit suitable caps to pipe connections to prevent
ingress of dirt.
Refit
17.Clean mating faces of pump and front cover and
fit new gasket into position over pump mounting
studs.
18.Remove pump blanking plugs.
19.Slacken the 3 bolts, securing injection pump
mounting bracket to cylinder block, sufficiently
enough to allow bracket to move.
20.Fit pump to cover and secure with 3 nuts.
Tighten to
25 Nm (18 lbf/ft).
21.Loosely attach pump to mounting bracket with
nuts and bolts, then tighten bolts securing
bracket to cylinder block and bolts securing
pump to bracket, finger tight only.
22.To ensure correct fitting and alignment of
injection pump, first tighten the 2 bolts securing
pump to mounting bracket to
25 Nm (18 lbf/ft).
Then tighten the 3 bolts securing mounting
bracket to cylinder block, also to
25 Nm (18
lbf/ft).
23.Connect spill return and main fuel pipes and
secure with banjo bolts. Tighten to
25 Nm (18
lbf/ft).
24.Connect boost signal pipe and secure with banjo
bolt. Tighten to
10 Nm (7 lbf/ft).
25.Connect fuel cut-off solenoid lead and throttle
position sensor multi-plug, if fitted.
26.Connect throttle cable and where applicable,
hand throttle cable.
27.Remove pump gear retaining toolLRT-12-045.
28.Carefully turn the pump hub nut in a clockwise
direction, sufficiently enough to enable timing
tool pin to be inserted into injection pump.
29.Fit gear retaining plate and secure with 3 bolts.
Tighten to
25 Nm (18 lbf/ft).
30.Remove timing pin.
31.Ensure flywheel timing pin is disengaged from
slot in flywheel.
32.Turn crankshaft two complete revolutions, check
timing pin fromRT-12-045can be fully and
easily inserted into the pump. At the same time
check flywheel timing pinLRT-12-044can also
be inserted in the flywheel slot.
33.If, with the flywheel timing pin located, the timing
pin cannot be inserted cleanly into the injection
pump, carry out the following:
a.Ensure flywheel timing pin is disengaged from
slot in flywheel.
b.Slacken the 3 pump gear retaining bolts.
c.Turn the pump hub nut in a clockwise
direction, sufficiently to enable timing tool pin to
be easily inserted into the injection pump.
d.Keeping the tension on the hub nut, check
that flywheel timing pin locates with slot in
flywheel.
e.Tighten the 3 pump gear retaining bolts to
25
Nm (18 lbf/ft).
f.Remove timing pins from pump and flywheel
housing.
34.Using a suitable anti-seize compound, fit the
blanking plug to flywheel housing. Tighten to
12
Nm (9 lbf/ft).
35.Fit access plate with gasket to front cover plate.
Tighten bolts to
25 Nm (18 lbf/ft).
36.Refit injector pipes.
37.Reconnect battery.

FUEL SYSTEM
3
REPAIR FUEL INJECTORS
Service repair no - 19.60.10
Remove
NOTE: When a fuel injector is considered
to be the cause of irregular running and
loss of power it will be necessary to fit a
donor set of injectors to determine which injector
is at fault. DO NOT attempt to dismantle or carry
out spray tests on the fuel injectors. This work
can only carried out by authorised Bosch dealers.
1.Remove oil filler cap and release sound
insulation cover from top of engine.
2.Disconnect high pressure fuel supply pipes from
injectors and injection pump. Remove in pairs.
3.Disconnect spill return hose(s) from injectors.
4.Plug pipes and injector connections to prevent
the ingress of dirt and foriegn matter.5.Remove retaining nut and release each injector
clamp plate from cylinder head.
6.Remove injector and discard copper washer.
Refit
7.Ensure injectors and seating in cylinder head are
clean.
8.Lightly grease a new copper sealing washer and
position on each injector.
9.Fit injectors in cylinder head with spill return
outlets facing outward.
10.Secure injector with clamp plate and nut. Tighten
nut to
25 Nm (18 lbf/ft).
NOTE: The clamp plates are slightly
curved and should be fitted with the
convex side uppermost.
11.Fit the spill return pipe with a single copper
washer under the head of the banjo bolt and 2
copper washers fitted between the injector and
the banjo. Tighten banjo bolt to
10 Nm (7 lbf/ft).
12.Fit high pressure pipes to injectors and injection
pump. Tighten union nuts to
28 Nm (21 lbf/ft).
13.Fit sound insulation cover and oil filler cap.

19FUEL SYSTEM
4
REPAIR FUEL LIFT PUMP
Service repair no - 19.45.09
Remove
NOTE: Blank off pipe ends and
connections to prevent ingress of dirt.
1.Disconnect battery.
2.Remove high pressure fuel pipes, injection pump
to injectors.
3.Disconnect fuel inlet and outlet pipes from lift
pump.
4.Remove 2 bolts and withdraw lift pump and
gasket from cylinder block.
Refit
5.Clean mating faces of pump and cylinder block.
6.Fit lift pump to cylinder block with a new gasket,
ensure correct location of operating lever with
camshaft.
7.Secure with bolts. Tighten to
25 Nm (18 lbf/ft).
8.Connect inlet and outlet pipes using new nuts
and olives.
9.Refit injector pipes. Tighten union nuts to
28 Nm
(21 lbf/ft).
FUEL SEDIMENTOR
Service repair no - 19.25.01
Remove
1.Disconnect battery.
2.Disconnect inlet and outlet fuel pipes from
sedimentor.
3.Slacken drain tap and allow sedimentor to
completely drain.
4.Remove 2 bolts, washers and nuts and detach
sedimentor from chassis mounting bracket.
Refit
5.Secure sedimentor to chassis mounting with
fixing bolts.
6.Reconnect inlet and outlet fuel pipes to
sedimentor.
7.Slacken drain plug until diesel free from air
flows, then retighten plug.
8.Prime vehicle fuel system.
See Adjustment,
Priming the fuel system
9.Reconnect battery.

FUEL SYSTEM
13
REPAIR THROTTLE CABLE
Service repair no - 19.20.06
Remove
1.Disconnect battery.
2.Remove split pin and clevis pin securing throttle
cable to injector pump throttle lever .
3.Depress ferrule retaining tags, release ferrule
from abutment bracket and withdraw throttle
cable.
4.Release throttle cable from clip on bulkhead.
5.Remove pin and clevis pin securing throttle
cable to pedal lever.
6.Release grommet from bulkhead.
7.Withdraw throttle cable from engine
compartment.Refit
8.Feed throttle cable through bulkhead from
engine compartment and fit grommet.
9.Secure throttle cable to pedal lever. Use new
split pin to secure clevis.
10.Secure throttle cable in bulkhead clip.
11.Guide throttle cable through abutment bracket
and fit ferrule.
12.Secure cable to injection pump throttle lever.
Use new split pin to secure clevis.
13.Adjust throttle cable.
See Adjustment,
Throttle cable
THROTTLE PEDAL
Service repair no - 19.20.01
Remove
1.Remove throttle cable from pedal.
See Throttle
cable
2.Remove 6 bolts securing throttle pedal assembly
to engine bulkhead.
3.Remove pedal assembly from footwell, complete
with trim retainer.
4.Release return spring from pedal lever.
5.Remove roll pin securing pivot shaft to pedal
assembly.
6.Withdraw pivot shaft and remove pedal from
mounting bracket.
7.Remove return spring from pedal boss.
Refit
8.Fit return spring to pedal boss.
9.Fit pedal to mounting bracket and locate return
spring.
10.Fit pivot shaft to pedal assembly and secure with
roll pin.
11.Locate return spring on pedal lever.
12.Secure throttle pedal assembly and trim retainer
to bulkhead. Tighten bolts to
9 Nm (7 lbf/ft).
13.Fit throttle cable to pedal.See Throttle cable
14.Adjust pedal, if necessary.See Adjustment,
Throttle pedal adjustment

19FUEL SYSTEM
18
REPAIR EGR THROTTLE POSITION SENSOR
Service repair no - 17.45.08
Remove
1.Remove 2 screws securing throttle position
sensor mounting plate to injection pump.
2.Disconnect sensor multi-plug.
3.Remove sensor assembly.
Refit
4.Position sensor assembly on injection pump and
secure with screws.
5.Connect multi-plug.
6.Adjust sensor
See Adjustment, EGR throttle
sensor
EGR CONTROL UNIT
Service repair no - 17.45.07
Remove
1.Raise centre seat, or cubby box
See CHASSIS
AND BODY, Repair, Cubby box
to gain access
to EGR control unit harness.
2.Disconnect control unit multi-plug and remove
centre seat or cubby box.
3.Remove 4 screws and detach control unit from
seat or cubby box base.
Refit
4.Secure EGR control unit to base of centre seat
or cubby box.
5.Position centre seat or cubby box and connect
control unit multi-plug.
6.Fit centre seat, or cubby box.
See CHASSIS
AND BODY, Repair, Cubby box

COOLING SYSTEM
1
DESCRIPTION AND OPERATION ENGINE COOLING SYSTEM
Description
The complete cooling system of the 300Tdi engine
incorporates three independent functions:- Engine
(coolant) cooling; Turbo (charge air) intercooling;
Engine oil cooling.The intercooler is a separate aluminium unit, located
on the LH side of the engine compartment adjacent to
the radiator, sharing the same upper and lower
mountings. For details of turbo intercooling
See
FUEL SYSTEM, Description and operation,
Operation
. The oil cooler matrix is an integral part of
the radiator. Pre-formed pipes/hoses are used to link
the components within the separate systems as
shown below.
Engine cooling system
1.Radiator
2.Thermostat housing
3.Radiator bottom hose
4.Viscous fan
5.Water pump
6.Radiator top hose
7.Heater return hose
8.Coolant supply hose
9.By-pass hose
10.Radiator bleed (purge) hose
11.Bleed (purge) hose, thermostat housing
12.'Y' piece ejector
13.Expansion tank14.Heater rail
15.Heater unit
16.Heater feed hose
17.Intercooler
18.Air cleaner
19.Air feed hose
20.Turbocharger
21.Charge air supply pipe/hose
22.Cooled charge air supply hose
23.Exhaust manifold
24.Engine oil cooler
25.Feed pipe, engine oil cooler
26.Return pipe, engine oil cooler
27.Oil filter

70BRAKES
18
REPAIR VACUUM PUMP
Service repair no - 70.50.19
Remove
NOTE: To ease pump removal set engine
to T.D.C. on No.1 cylinder.
1.Disconnect battery.
2.Remove air cleaner
See FUEL SYSTEM,
Repair, Air cleaner
.
3.Detach servo hose from vacuum pump.
4.Remove bolt securing air cleaner support
bracket strut.
5.Remove 6 bolts securing vacuum pump.
6.Detach pump complete with strut and harness
bracket. Note location of strut and bracket for
Refit.
Refit
7.Clean mating faces of pump and block.
8.Loosely assemble pump to block with a new
gasket and with air cleaner strut and harness
bracket located under heads of bolts noted
during Remove.
9.Evenly tighten bolts, to depress pump plunger,
finally tightening to
25 Nm (18 lbf/ft).
10.Secure strut to air cleaner bracket.
11.Connect vacuum hose and secure with clip.
12.Refit air cleaner
See FUEL SYSTEM, Repair,
Air cleaner
.

86ELECTRICAL
2
DESCRIPTION AND OPERATION VEHICLE IMMOBILISATION AND ALARM SYSTEM
A sophisticated engine immobilisation and anti-theft
alarm system is offered on the Land Rover Defender
300 Tdi vehicle range, which incorporates the
following features:
Perimeter protection
This part of the alarm system protects side doors,
bonnet and rear door against unauthorised entry -
alarm sounding if any one of these apertures is
opened without alarm first being disarmed.
Interior protection
Also known as volumetric protection, this part of the
system protects space inside the vehicle. Once
armed, the alarm will sound if a door is opened, or if
movement is detected inside the vehicle.
Engine immobilisation
The engine is immobilised electronically whenever the
alarm system is armed. Even if the alarm has not
been armed, engine immobilisation will occur
automatically thirty seconds after the driver's door is
opened, or five minutes after the starter switch is
turned to position '0'.
ALARM SYSTEM COMPONENTS
Electronic control unit (ECU)
The ECU is the alarm system brain and controls all
vehicle immobilisation and alarm functions. It
responds to the inputs received, by supplying suitable
outputs to indicate status of the alarm system or
activating relevant warning devices. unit is located
under fascia behind instrument binnacle.
Handset and key
The handset is the primary source of control for the
alarm system i.e. it arms and disarms the alarm
components. The key can be used to override engine
immoblisation if the handset is lost or fails to operate,
seeEngine immobilisation override.The handset battery should last for approximately
three years dependent upon use. The following
symptoms will be noticed when the battery requires
replacement:
1.The handset will only work every other operation
while disarming.
2.The direction indicator lamps will not flash when
the alarm is disarmed.
For battery replacement procedure, seeHandset
Battery.
Passive coil
The passive coil is fitted on the starter switch and
activates a receiving coil in the handset, causing it to
automatically transmit a remobilisation signal to the
ECU.
Aerial
The aerial is integral within the alarm system harness
and supplies the ECU with the signal received from
handset.
Immobilisation spider
The immobilisation spider provides an interface
between ECU and immobilised areas of the vehicle.
This is installed in a sealed (safe) box inside the
vehicle battery box.
Digital diesel shut-off valve - 97 MY
When fitted, the digital diesel shut-off valve
immobilises the fuel injection pump by preventing
power reaching the fuel shut-off solenoid,
See
Immobilisation and alarm system circuit diagram -
with DDS
.