fuel pump LAND ROVER DISCOVERY 1995 Repair Manual

19FUEL SYSTEM
8
DESCRIPTION AND OPERATION ADD: 09/95 ENGINE MANAGEMENT SYSTEM COMPONENT
LOCATION - ADVANCED EVAPS
1.Engine control module (ECM)
2.Ignition coils
3.Fuel pressure regulator
4.Mass air flow (MAF) sensor
5.Relay module
- Main relay
- Fuel pump relay
6.Engine coolant temperature (ECT) sensor
7.Camshaft position (CMP) sensor
8.Throttle position (TP) sensor

19FUEL SYSTEM
10
DESCRIPTION AND OPERATION ADD: 09/95 DESCRIPTION AND OPERATION - ADVANCED
EVAPS
1.Fuel filter
2.Fuel pump and gauge sender unit
3.Fuel feed hose
4.Fuel return hose
5.Fuel filler neck assembly
Fuel Tank Assembly
The fuel tank consists of a moulded High Density
Polyethylene (HDPE) fuel cell into which is fitted an
electric fuel pump and four roll-over valves. The pump
is a self priming ñwet" type where the motor is
immersed in fuel. The pump assembly is sealed to the
tank with a rubber seal and secured in place using a
coated steel locking ring. The pump also incorporates
a fuel tank pressure sensor in the top flange.
NOTE: If the pump is removed, a new seal
must always be fitted.

SFI
11
DESCRIPTION AND OPERATION ADD: 09/95 Fuel Filler Neck Assembly
The filler neck consists of a stainless steel upper
section and a convolute nylon lower section. The
nylon lower is joined at one end to the tank and at the
other to the stainless upper section where both joints
utilise a short piece of rubber hose. The joint at the
fuel tank is secured using a spring assisted hose clip
which has a shear off cap.
NOTE: The spring assisted clip must never
be re-used, if removed a new clip of the
same type must be fitted.
Tank vent connections are achieved using serviceable
plastic quickfit connectors. The filler cap is tethered to
the body of the vehicle. Only a cap of this type must
be used as a replacement.Fuel Lines
The fuel lines consist of two coated steel lines fitted
along the length of the chassis from the fuel pump at
the rear of the vehicle to the connections at the fuel
rail on the engine, via a fuel filter on the feed line.
Connections at the pump are metal quickfits, while
those at the filter and fuel rail are threaded unions
utilising "O" rings for effective sealing.
NOTE: When the fuel filter is serviced or
the fuel rail joints are disconnected, new
"O" rings must always be fitted.
Connections at the fuel rail are made using "Saginaw"
screw thread type connectors with "O" rings as the
sealing medium. The fuel lines in the engine
compartment are made from a braided nylon material.
NOTE: This material must not be clamped
or kinked as this impairs its performance.

SFI
3
REPAIR FUEL SYSTEM - DEPRESSURISE
WARNING: Fuel pressure of up to 2.5 bar
will be present in the system, even if the
engine has not been run for some time.
Always depressurise the system before
disconnecting any components in the fuel feed
line (between fuel pump and pressure regulator).
The spilling of fuel is unavoidable during this
operation. Ensure that all necessary precautions
are taken to prevent fire and explosion.
NOTE: Fuel pressure can be relieved at
fuel rail feed union or fuel filter unions.
1.Position cloth around relevant union to protect
against fuel spray.
2.Carefully slacken union.
3.Tighten union to correct torque once pressure
has relieved.

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REPAIR ADD: 09/95 Refit
6.Fit a NEW filter to bracket.
NOTE: Ensure direction of flow arrow
stamped on canister is correct.
7.Position filter mounting bracket to chassis and
secure with nut and bolt.
8.Remove plugs from fuel hose ends.
9.Lubricate NEW 'O' rings with clean fuel and fit to
fuel hoses.
10.Connect fuel hoses to filter and tighten unions to
18 Nm.
CAUTION: Use two spanners when
loosening or tightening unions.
11.Remove stand(s) and lower vehicle.
12.Run the engine to check for any fuel leaks.FUEL PUMP AND GAUGE SENDER UNIT -
ADVANCED EVAPS
Service repair no - 19.45.03
A plastic fuel tank with a combined fuel pump and
gauge sender unit is fitted. The top flange of the pump
also houses a pressure sensor which is not removable
from the pump. The fuel pump is accessed through a
panel in the load space floor.
WARNING: Ensure that fuel handling
precautions given in 01 - Introduction are
strictly adhered to when carrying out
following instructions.
CAUTION: Before disconnecting any part
of fuel system, it is imperative that all dust,
dirt and debris is removed from around
components to prevent ingress of foreign matter
into fuel system.
Remove
1.Depressurise fuel system.
See fuel system -
depressurise - advanced evaps
2.Disconnect battery negative lead.
3.Check the amount of fuel in the tank. If the tank
is full, drain 2.4 US gallons (9 litres) minimum.
See fuel tank - draining - advanced evaps
4.Remove 6 screws securing tail door tread strip
and remove tread strip.
5.Remove RH luggage compartment side panel.
See CHASSIS AND BODY, Repair, rear
compartment lower trim panels

19FUEL SYSTEM
18
REPAIRADD: 09/95
6.Fold back loadspace carpet and sound
insulation to reveal access panel.
7.Remove 6 screws securing fuel pump access
panel.
8.Remove access panel.
9.Disconnect multiplugs from fuel pump and
pressure sensor.
10.Release vent hose from pressure sensor body.
11.Noting their fitted positions, disconnect both fuel
connections by pressing the black release
latches on each connector and pushing the
connector back down the line. Care must be
taken to catch any excess fuel which may spill
from the fuel lines once removed.

SFI
19
REPAIR ADD: 09/95
12.Using service tool LRT-19-009 loosen and
remove the metal locking ring.
13.Prise the pump from the tank opening using a
blunt instrument under the edge of the pump
flange. Once clear of the seal, tip the pump to
the right to allow fuel contained in the body of
the pump to drain into the tank.
CAUTION: Do not lift the pump from the
tank using the feed and return stubs.
14.Remove and discard seal.Refit
15.Fit NEW pump seal to tank opening.
16.Carefully lower pump into tank opening, pressing
firmly on the pump top flange to allow correct
positioning.
NOTE: Ensure location tag on pump top
flange is engaged correctly to tank
opening lip.
17.Fit locking ring and tighten to
35 Nmusing
service tool LRT-19-009.
18.Connect both fuel lines to the pump by pushing
the connectors down each line square to the
pump connection until the connectors positively
latch.
19.Connect vent hose to pressure sensor body.
20.Connect multiplugs to fuel pump and pressure
sensor.
21.Reconnect battery negative lead.
22.Refill tank with drained fuel.
23.Run the engine to check for any fuel leaks.
24.Fit access panel and secure with screws.
25.Reposition loadspace sound insulation and
carpet.
26.Fit RH luggage compartment side panel.
See
CHASSIS AND BODY, Repair, rear
compartment lower trim panels
27.Fit tail door tread strip and secure with screws.

19FUEL SYSTEM
20
REPAIRADD: 09/95 FUEL SYSTEM - DEPRESSURISE - ADVANCED
EVAPS
Service repair no - 19.50.02
WARNING: Fuel pressure of up to 2.5 bar
will be present in the system, even if the
engine has not been run for some time.
Always depressurise the system before
disconnecting any components in the fuel feed
line (between fuel pump and pressure regulator).
The spilling of fuel is unavoidable during this
operation. Ensure that all necessary precautions
are taken to prevent fire and explosion.
NOTE: Fuel pressure can be relieved at
fuel filter unions.
1.Position cloth around relevant union to protect
against fuel spray.
2.Carefully loosen union.
CAUTION: Use two spanners when
loosening or tightening unions.
3.Tighten union once fuel pressure is relieved.
4.Remove cloth.FUEL TANK - ADVANCED EVAPS
Service repair no - 19.55.01
WARNING: Ensure fuel handling
precautions given in section 01
Introduction are strictly adhered to when
carrying out following instructions.
CAUTION: Before disconnecting any part
of fuel system, it imperative that all dust,
dirt and debris is removed from around
components to prevent ingress of foreign matter
into fuel system.
Remove
1.Disconnect battery negative lead.
2.Drain fuel tank completely.
See fuel tank -
draining - advanced evaps
3.Remove 6 screws securing tail door tread strip
and remove tread strip.
4.Remove RH luggage compartment side panel.
See CHASSIS AND BODY, Repair, rear
compartment lower trim panels

SFI
21
REPAIR ADD: 09/95
5.Fold back loadspace carpet and sound
insulation to reveal access panel.
6.Remove 6 screws securing fuel pump access
panel.
7.Remove access panel.8.Disconnect multiplugs from fuel pump and
pressure sensor
9.Noting their fitted positions, disconnect both fuel
connections by pressing the black release
latches on each connector and pushing the
connector back down the line.
10.Care must be taken to catch any excess fuel
which may spill from the fuel lines once
removed.
11.Raise rear of vehicle.
WARNING: Support on safety stands.

SFI
23
REPAIR ADD: 09/95
20.Remove nut and bolt securing RH side of upper
fuel tank strap to chassis.
21.Remove 4 nuts and bolts securing fuel tank
cradle.
22.Remove fuel tank cradle.
23.With assistance, tilt right hand side of tank
upwards and manoeuvre through chassis to
remove.
Do not carry out further dismantling if
component is removed for access only.
24.Release vent hose from tank pressure sensor.
25.Remove vent hose from 3 fuel tank clips.
26.Using service tool LRT-19-009 loosen and
remove the metal locking ring.
27.Prise the pump from the tank opening using a
blunt instrument under the edge of the lip of the
pump flange.
CAUTION: Do not lift the pump from the
tank using the feed and return stubs.
28.Remove and discard seal.