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Bleed the air from the electric fuel pump and this filter cartridge by
simply turning on the keyswitch
(generator - depress preheat switch)
for 30 to 40 seconds, then start the unit and check for leaks.
Fuel Pump
In a solenoid-operated (transistor type)
12 volt DC fuel pump,
the reciprocating
motion of the pump plunger is controlled
by a transistorized circuit.
The
oscillator
section
incorporates
transistors, diodes and resistors.
When
the
transistor
circuit
is
closed
and
the
solenoid
coil
is
excited,
a
sucking
force
acts
on
the
plunger
forcing it down against the spring force
and
the
fuel,· pushing up the deli very
valve,
that
leads
into
the
plunger.
When the
transistor circuit is opened,
the plunger is pushed back upward by the
spr ing
force,
forcing
the
fuel out of
the outlet port,
and at the same time,
the
inlet
valve
opens
and
the
fuel
enters the lower chamber.
(1)
(2)
(3)
(4)
(5)
Diaphragm
(6)
Plunger
Oscillator
(7)
Outlet valve
Solenoid coil
(8)
Spring
Filter
(9)
Inlet valve
Filter cover
Fuel Pump
Disassembly and Reassembly of the Electric Fuel Pump for Cleaning
Since this
tr ansistor ized fuel pump is of a
totally enclosed type,
only the cover, filter and plunger assembly require cleaning.
Using a 17 rom wrench, remove the cover (1) as illustrated.
Then, the
cover gasket
(2), magnet
(3)
and filter
(4)
can be removed from the
pump body.
(I) Cover
(2) Cover gasket
(3) Magnet
(4) Filter
(13) Body
Removal of Filter
66
(6) Spring retainer
(7) Washer
(8) D-ring
(9) Valve
(10)
Plunger spring
(11)
Plunger
(12)
Plunger tube
(13) Body
Removal of Plunger
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