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14-60
CARBURETOR-AFB
(7) Remove the vacuum diaphragm and bracket as-
sembly and place to one side to be cleaned as a spe-
cial item.
A
liquid cleaner may damage the diaphragm
material.
(8) Remove the ten screws that attach the air horn
to the main body. (1 screw in hole in air horn). Lift
air horn straight up and away from the main body.
When removing air horn, use care so as not to bend
or damage the floats.
Remove the accelerator pump
and plunger lower spring from the pump cylinder.
Disassembling the Air Horn
Place the air horn in an inverted position on the
bench (to protect the floats) then proceed to disas-
semble as follows:
(1) Using a suitable Tool, remove the float fulcrum
pins, (left and right) then lift the float up and out of
bosses on air horn.
NOTE:
It is suggested that the float on the pump
side
be marked
so
that the floats can be re-installed
in their respective positions.
(2)
Remove the two needle valves from their re-
spective seats, after marking the one on the pump
side for identification. Using a wide blade screw driv-
er, remove the needle valve seats. Be sure each nee-
dle valve is returned to its original seat at reassem-
bly.
(3) Remove the spring clip that holds the throttle
connector rod in the center hole of the pump arm.
Remove the pump arm pivot screw and lift off the
pump arm, at the same time, disengage the link from
the arm and the pump stem. Slide the accelerator
pump plunger and spring out of the air horn. Remove
gasket.
(4)
Place the accelerator pump plunger in a jar
of
clean gasoline or kerosene, to prevent the leather
from drying out.
(5)
Remove the fuel inlet fitting and filter screen
from the air horn.
PRIMARY VENTURI
ACCELERATOR PUMP
CLUSTER
INTAKE CHECK VALVE
/
/ACCELERATOR PUMP
HOUSING JET
ACCELERATOR
PUMP
%
DISCHARGE
iri\
PASSAGE
-
.
N
K587
Fig. 3-Removing
or Installing Accelerator Pump
Jet Housing
MAIN ME~ERING
JET
(SECONDARY)
(2)
m
Fig. L R e m o v i n g or Installing M a i n Metering l e t
(6)
Test the freeness of the choke mechanism in
the air horn. The choke shaft must float free to
op-
erate correctly. If the choke shaft sticks in the bear-
ing area, or appears to be gummed from deposits in
the air horn, a thorough cleaning will be required.
Main Body Disassembly
(1) Remove the screws that attach the accelerator
pump jet housing to the main body. Lift out the jet
housing and gasket as shown in (Fig. 3). Discard the
gasket. Now, invert the main body and drop out the
discharge check needle from the discharge passage.
(2) Using Tool T109-58, remove the main metering
jets (primary side), as shown in (Fig.
4).
The primary
and secondary main metering jets are not inter-
SECONDARY VENTURI
&\,
PRIMARY VENTURI
CLUSTER (PUMP SIDE)
I
Y
GASKET
PRIMARY
VENTURI
Fig. 5-Removing
or Installing Primary Venturi
Cluster
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