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