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14-32
CARBURETOR-BBD
1 ' / z
INCH
T109-288s elevating legs through the carburetor throt-
tle
body stud holes. (These tools are used to protect
the throttle valves from damage and to provide a
suitabIe base for working.)
(2) Remove the hairpin clip and disengage the fast
idle connector rod from the throttle and fast idle
levers.
(3) Remove the hairpin clip and disengage the ac-
celerator rod from the throttle lever and the pump
rocker arm.
(4) Remove the vacuum hose between the carburet-
or throttle body fitting and the vacuum diaphragm.
(5)
Remove the clip from the choke operating link
and disengage the link from the diaphragm plunger
and the choke lever. Refer to (Fig. 1).
(6) Remove the vacuum diaphragm and bracket as-
sembly and place to one side, to be cleaned as a special
item.
A
liquid cleaner may damage the diaphragm ma-
terial.
(7)
Remove the air horn retaining screws and lift
air horn straight up and away from the main body.
Discard the gasket
(2
screws recessed).
(8) Disengage the accelerator pump plunger from
the accelerator pump arm by pushing up on bottom
of plunger and sliding plunger shaft
off
hook. Slide
plunger out of air horn and remove the compression
spring and seat.
If the old plunger can be used again or if a new
plunger is to be installed, place the plunger in a jar
of clean gasoline or kerosene to prevent the leather
from drying out.
(9) Remove the fuel inlet needle valve, seat and
gasket from the main body.
(10) Lift out the float fulcrum pin retainer, and lift
out the floats and fulcrum pin.
(11) Remove the step-up piston and retaining screw
and slide the step-up piston and rods out of well, as
shown in (Fig.
2).
Lift out the step-up piston spring.
I
NK612
MAIN METERING JETS
. * i
Fig. 2-Removing
or
Installing the Step-up Piston
MAIN METERING JETS
u (
N K 613
Fig. 3-Removing
or Installing the M a i n Metering
Jets
Remove the step-up piston gasket from the bottom
of
the well.
(12) Remove the main metering jets as shown in
(Fig. 3).
(13) Remove the venturi cluster screws, then lift
the venturi cluster and gaskets up and away from the
main body, as shown in (Fig. 4). Discard the gaskets.
Do
not remove the idle orifice tubes or the main vent
tubes from the cluster.
They can be cleaned in a sol-
vent and dried with compressed air.
(14) Invert the carburetor and drop out the accel-
erator pump discharge check ball and the intake check
ball. (The intake check ball is the largest.)
(15) Remove the idle mixture adjusting screws and
springs from the throttle body.
VENTURI CLUSTER C
ACCELERATOR
DISCHARGE
NK614
VENTURI CLUSTER SCREWS
</
3
-
-
Fig. &Removing
or Installing the Venturi Cluster
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