1996 LAND ROVER DEFENDER Workshop Manual

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
5
REPAIR FUEL FILTER ASSEMBLY
Service repair no - 19.25.02
Remove
1.Disconnect battery.
2.Place a suitable container under filter element
and slacken filter bleed screw.
3.Slacken drain tap and allow fuel to drain from
filter element.
4.Slacken fuel inlet and outlet banjo connections.
5.Remove 2 bolts and nuts securing filter head to
inner wing.
6.Remove fuel inlet and outlet banjo bolts and
detach fuel pipes.
7.Remove filter assembly from vehicle. Unscrew
filter element, if necessary.
8.Plug fuel pipe ends to prevent ingress of dirt.Refit
9.Position filter assembly and fit fuel inlet and
outlet pipes using new copper sealing washers
both sides of the banjo connections.
10.Secure filter head to inner wing.
11.Fully tighten banjo connections.
12.Prime fuel system to remove any air trapped in
filter
See Adjustment, Priming the fuel
system
13.Reconnect battery.
FUEL FILTER ELEMENT
Service repair no - 19.25.07
For remove and refit procedure.
See Fuel filter
element

19FUEL SYSTEM
6
REPAIR SIDE MOUNTED FUEL TANK
Service repair no - 19.55.05
NOTE: This fuel tank is standard on 90
models and an option on 110/130 2 door
vehicles fitted with twin tanks.
Remove
WARNING: Before any attempt is made to
start the removal procedure it is vital that
the FUEL HANDLING PRECAUTIONS are
carefully studied and implemented in the interests
of safety.
See INTRODUCTION, Information, Fuel
Handling Precautions
1.Disconnect battery.
2.Remove fuel filler cap.3.Remove fuel tank drain plug, allow fuel to drain
into a clean container and refit plug.
4.Remove RH seat cushion.
5.Release retaining catch and remove seat base
cover to gain access to fuel tank.
6.Disconnect electrical plug from fuel gauge unit.
7.Disconnect fuel supply pipe from tank.
8.Disconnect spill return pipe from fuel tank.
9.Disconnect breather pipe from fuel filler tube.
10.Slacken hose clip and remove filler hose from
filler tube.
11.From rear of tank, remove 2 nuts and washers
securing tank mounting to captive-headed bolts.
12.Support rear of fuel tank and remove captive
bolts.

FUEL SYSTEM
7
REPAIR REV: 05/99
13.Remove single bolt fixing assembly securing
front of tank to chassis mounted bracket.
14.Remove 3 bolts securing tank mounting bracket
to chassis and release bracket.
15.Lower front of tank while turning anti-clockwise
and remove from vehicle.
16.If required, remove tank gauge unit.
See
INSTRUMENTS, Repair, Fuel gauge tank unit
- side fuel tank
orSee INSTRUMENTS,
Repair, Fuel gauge tank unit - rear fuel tank,
110/130
Refit
17.Fit filler hose and clip to tank but do not fully
tighten. Position clip screw so that it is
accessible when tank is fitted.
18.Fit breather hose and secure with clip.
19.Position fuel tank in vehicle and loosely secure
front mounting bracket to tank with special bolt
and rubber bushes.
20.Secure mounting bracket to chassis with 3 bolts
and fully tighten to
20 Nm (15 lbf/ft).
21.Secure rear of tank to chassis mounting and
tighten captive bolt plate fixings to
20 Nm (15
lbf/ft).
22.Fully tighten front fixing bolt assembly to20 Nm
(15 lbf/ft).
23.Fit spill return and fuel supply pipes and secure
union connections.
24.Fit fuel level unit electrical plug.
25.Fit hose to filler tube and tighten upper and lower
clips.
26.Check that drain plug is secure and fill fuel tank.
27.Reconnect battery.
28.Prime fuel system
See Adjustment, Priming
the fuel system
and start engine.
29.Check system for leaks and operation of fuel
gauge.
30.Fit seat base cover and seat cushion.SIDE MOUNTED FUEL TANK - 5 DOOR VEHICLES
Service repair no - 19.55.01
NOTE: This fuel tank is used on 110/130 5
door vehicles fitted with a twin tank
option.
WARNING: Before any attempt is made to
start the removal procedure it is vital that
the FUEL HANDLING PRECAUTIONS,
See
INTRODUCTION, Information, Fuel handling
precautions
are carefully studied and
implemented in the interests of safety.
Remove
1.Disconnect battery.
2.Remove tank drain plug, allow fuel to drain into a
clean container, and refit plug.
3.Remove RH seat cushion.
4.Remove retaining catch and remove seat base
cover to gain access to fuel tank.
5.Disconnect electrical plug from fuel gauge unit.
6.Disconnect fuel supply pipe from tank.
7.Disconnect spill return pipe from tank.
8.Remove 3 bolts securing tank to front mounting
bracket.
9.Support front of tank and remove single fixing
assembly securing tank to rear mounting
bracket.
10.Remove tank from vehicle.
11.If required, remove fuel gauge unit.
See
INSTRUMENTS, Repair, Fuel gauge tank unit
- side fuel tank
orSee INSTRUMENTS,
Repair, Fuel gauge tank unit - rear fuel tank,
110/130
Refit
12.Position fuel tank in vehicle and loosely secure
to rear mounting bracket with special bolt and
rubber bushes.
13.Secure tank to front mounting bracket and
tighten fixings to
20 Nm (15 lbf/ft).
14.Fully tighten rear fixing bolt assembly to20 Nm
(15 lbf/ft).
15.Fit spill return and fuel supply pipes to fuel tank
and securely tighten union connectios.
16.Fit electrical plug to fuel gauge unit.
17.Check that drain plug is secure and fill fuel tank.
18.Reconnect battery.
19.Prime fuel system.
See Adjustment, Priming
the fuel system
and start engine.
20.Check system for leaks and operation of fuel
gauge.
21.Fit seat base cover and seat cushion.

19FUEL SYSTEM
8
REPAIR REAR MOUNTED FUEL TANK - 110/130
Service repair no - 19.55.26
WARNING: Before any attempt is made to
start the removal procedure it is vital that
the FUEL HANDLING PRECAUTIONS
See
INTRODUCTION, Information, FUEL HANDLING
PRECAUTIONS
are carefully studied and
implemented in the interests of safety.
Remove
1.Disconnect battery.
2.Remove fuel filler cap.
3.Remove tank drain plug, allow fuel to drain into a
clean container, and refit plug.
4.Slacken retaining clips and disconnect fuel filler
hose from rear tank.5.Disconnect breather hose from filler tube.
6.Disconnect electrical plug and fuel supply pipe
from outlet pipe union on fuel gauge unit.
7.If the vehicle is fitted with a tow ball drop-plate
with support bars, the bars must be removed.
8.Remove anti-roll bar chassis mountings.
See
REAR SUSPENSION, Repair, Anti-roll bar
and push roll bar down to provide access to the
tank.
9.Remove LH lashing eye to assist access to tank.
10.Position a support under the tank, preferably one
that can be progressively lowered.

FUEL SYSTEM
9
REPAIR REV: 05/99
11.Remove 2 nuts that secure front fixing assembly
of the tank to chassis mounting bracket.
12.Remove tank rear mounting nuts.
13.With care, lower tank sufficiently to enable nut
and olive of spill return to be disconnected from
elbow in centre of tank.
14.Continue to lower tank until it can be removed
from vehicle.
NOTE: On later vehicles a separate stone
guard is fitted and is attached to the tank
with the existing front and rear fixings.
15.If required, remove tank gauge unit.
See
INSTRUMENTS, Repair, Fuel gauge tank unit
- side fuel tank
orSee INSTRUMENTS,
Repair, Fuel gauge tank unit - rear fuel tank,
110/130
Refit
16.If applicable, locate stone guard under tank.
17.Raise rear tank into position and connect spill
return pipe to the elbow with the nut and olive.
18.Continue to raise tank so that front and rear
mounting bolts locate in respective tank flange
holes.
19.Fit and tighten fixings to
20 Nm (15 lbf/ft).
20.Connect fuel suppnly pipe to the tank unit.
21.Fit fuel filler hose and breather pipe to filler tube
and secure with retaining clips.
22.Fit LH lashing eye to chassis.23.Fit anti-roll bar chassis mountings.
See REAR
SUSPENSION, Repair, Anti-roll bar
24.Check that drain plug is secure and fill fuel tank.
25.Reconnect battery.
26.Prime fuel system.
See Adjustment, Priming
the fuel system
and start engine.
27.Check system for leaks and operation of fuel
gauge.

19FUEL SYSTEM
10
REPAIR TWIN TANK CHANGE-OVER TAP ASSEMBLY
Service repair no - 19.43.50 - Fuel supply tap
Service repair no - 19.43.51 - Spill return tap
Service repair no - 19.43.52 - Fuel tank
change-over lever
Remove
1.Disconnect battery.
2.Remove RH front seat cushion.
3.Release retaining clip and remove access cover
from seat base.
4.Disconnect leads from fuel tank change-over
switch.
5.Unscrew retaining nut and withdraw change-over
lever and washers from pivot pin at heelboard.
6.Disconnect spill return pipes at spill change-over
tap.
7.Remove 4 bolts, washers and nuts securing tap
support bracket assembly to heel board.
8.Lift up support bracket assembly and disconnect
control rod from spill tap lever.
9.Remove support bracket assembly from vehicle.
10.Disconnect fuel supply pipes at fuel change-over
tap.
11.Remove 2 screws and release fuel tap from
chassis mounted support bracket.12.Remove fuel tap, complete with operating rod
and lever.
13.Plug all connections to prevent ingress of dirt.
14.Dismantle spill return and fuel tap components
as necessary.
Refit
15.Fit fuel change-over tap, complete with operating
rod and lever, to chassis mounted support
bracket and fully tighten fixing screws.
16.Connect fuel supply pipes at fuel tap, ensuring
they are fitted to correct ports.
17.Position support bracket assembly behind
heelboard and connect operating rod to spill
change-over tap lever.
18.With pivot pin bush correctly seated, secure
support bracket assembly to heel board and
tighten fixings to
8 Nm (6 lbf/ft).
19.Connect spill return pipes to change-over tap,
ensuring they are fitted to correct ports.
20.Secure change-over lever to pivot pin.
21.Fit leads to fuel tank change-over switch.
22.Reconnect battery.
23.Prime vehicle fuel system,
See Adjustment,
Priming the fuel system
if necessary and
check for leaks.
24.Fit access cover to seat base and seat cushion.