Defender 90 / 110 / 130. Instruction - page 58

PETROL FUEL SYSTEM

LAND ROVER 110 TWIN TANK INSTALLATION

Description

The fuel system includes two fuel tanks, one at

t h e

rear

of the vehicle and an additional fifteen gallon

litres) capacity tank

on the right-hand side of the

vehicle. Both tanks contain

an

electrically operated

submerged fuel pump

in addition to a fuel level

indicator unit in each tank. An ignition controlled
switch

on

the control panel enables the driver to select

the tank to be used. The switch also energises the fuel
level indicator unit of the tank selected and records the
fuel

level on the single indicator dial. When

t h e

ignition

is

switched ‘on’ the pump in the selected tank will draw

fuel into the carburetter float chamber via

a paper

element type filter and a vapour separator.

To prevent

fuel vapourisation and air locks a

return system is

incorporated in the fuel pipe layout to pass back vapour
and excess fuel from the

vapour separator to the tank in

through a restrictor and a solenoid operated valve.

The valve, which is

by the tank selection

switch, closes the port to the tank not

i n use and

simultaneously opens the port to

sclccted tank. The

restrictor

is necessary to prevent fuel by-passing the

carburetter and flowing back to the selected tank
through the spill return
In addition, a non-return valve is enclosed inside the
hose connection of the supply pipe from

t h e

rear and

side tanks to prevent the possibility of

back-flow

of

fuel along the supply lines to

fuel tanks.

A. Fuel tankswitch

LAND ROVER 110 REAK TANK AND

90 SIDE TANK

Description

Fuel drawn by the electrically operated in-tank pump,
is delivered to a paper element type filter. Situated

the right-hand front footwell attached to a

chassis outrigger from

fuel enters a vapour

separator located

on the left-hand side

of

the bulkhead

in

engine compartment. Fuel finally

carburetter float chamber from the port at the base of

the

vapour separator. The vapour separator comprises

part of the spill return system and its purpose is to
prevent fuel vapour causing air locks in the supply to

the

carburetter. Vapour and excess fuel flows back into

fitted

return port

on the vapour separator. The restrictor is

designed to assist

in maintaining a constant fuel level in

t h e

vapour separator bowl and to prevent fuel flowing

back to the tank at the same rate as the delivery.

FUEL FILTER

C.

From fuel filter to carburetter via vapour separator

25

PE

TROL

F

U

EL

S

YST

E

M

.

VAPOUR SEPARATOR

A. Vapour separator

Spill return

to

side tank

C.

Restrictor and spill return to solenoid valve

Outlet from separator to carburetter

SPILL RETURN SOLENOID VALVE

A . Solenoid valve

Spill return to side tank

C. Spill return to rear tank

To carburetter via filter and vapour separator

NON-RETURN VALVE

A. Non-return valve

Spring

C.

Ball

FUEL

PUMP

A. Pump and

motor

Filter

C . Gasket

Electrical terminals

E.

Outlet pipe

F.

Fixing plate to tank

G.

Plastic tie clip

-

See CAUTION

-

remove and

refit pump

27

PETROL FUEL SYSTEM

LAND ROVER 110 TWIN

TANK FUEL SYSTEM

I

28

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