Manual shut-off required for
return line plumbed back to
main tank for re-fueling
FUEL SUPPLY SYSTEM cont’d
PUMP SUPPLY
GRAVITY SUPPLY
Fuel Tank
Fuel Tank
Overflow/return line
OFF
OFF
ON
ON
Fuel
filter
Fuel
filter
FUEL FILTERS &
MANUAL SHUT-OFFS
Fuel must be filtered before it reaches a fuel pump or the metering valve to
prevent dirt & debris from plugging check valves in the pump or the needle &
seat of the valve.
There must also be a manual shut-off between the tank and the valve to
relieve pressure on the valve needle when the stove is not in use. When not
in use, relying on the valve alone to shut off fuel flow may cause wear to its
mechanism.
Check valve
29
In line Pressure regulator part number: #20-003
Fuel filter & manual shut-off Part number #20-010
WALBRO Standard Fuel Pump #20-000
WALBRO Heavy Duty Fuel Pump #20-002
VENT
FILL
OFF
ON
PARTS
PARTS
FIG 50
FIG 51
Overflow/return line
When using a low pressure fuel pump to deliver fuel from a main fuel tank,
the fuel line must connect as close to the fuel tank as possible and not draw
from the engine fuel supply or engine filter. Use a check valve in the fuel
line to prevent the engine drawing fuel away from the appliance.
When installing a Walbro fuel pump supplied by Dickinson, the best results
will be obtained by locating the pump somewhere it will ‘pull’ fuel
upwards rather than placing it at the tank to ‘push’ fuel upwards.
We carry both standard and heavy duty fuel pumps. In a mild climate
where a fuel run equates to less than a 4 foot vertical rise or 15 feet of
horizontal travel, the standard pump should be sufficient. In a colder
climate, or where the run requires more than a 4 foot rise or 15 feet of
horizontal travel, a heavy duty pump is recommended.
The maximum pressure of the heavy duty pump can exceed the 3 PSI inlet
pressure the valve is rated for, and so it is equipped with an adjustable
pressure regulator to reduce it (page 30, fig 48)
When using a gravity tank, there must be a minimum
head of 12” above the oil level mark on the side of
the valve to operate correctly (see page 25)
The gravity feed tank must be vented and all fuel lines
must be as straight as possible to avoid air locks that
will impede the flow of fuel.
Do not use a pressurized fuel tank.
The oil metering valve is rated for an incoming fuel
pressure of 3 PSI. If the incoming pressure exceeds 4
PSI, a pressure regulator will need to be installed in
line to reduce it.
If you’re using a tank a capacity larger than 30 gal or
located more than 7 feet above the appliance valve
height, a pressure regulator will be required as well.
(page 30, fig 48)
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