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14-56
CARBURETOR-WWC3
CHOKE VALVE
FULLY CLOSED
Fig. 20-Choke
Operating link Clearances
open after the engine reaches the normal operating
temperature.
If a clearance does not exist in both of these posi-
tions, a recheck of the operating link adjustment
should be made.
NOTE:
Free movement of the choke valve between
the closed and open positions i s very necessary.
This free movement should also exist between the
kick and the open choke valve positions with the en-
gine running. If binding does exist, the choke operat-
ing link has been improperly bent and should be cor-
rected.
Unloaded Adjustment fWide Open
KickJ
21), then proceed as follows:
To make the unloaded adjustment, refer to (Fig.
SPECIAL GAUGE O R
DRILL
AT WIDEST
CHOKE OPENING
I
s ,
LIGHT CLOSING P R E S S U R E
BEND TANG
AT'
THIS
POINT
FAST
IDLE
CAM
THROTTLE L E V E R
HELD
IN
WIDE
OPEN POSITION
NK434
I
Fig. 21-Choke
Unloader Adjustment (Wide
Open Kick)
(1) Lightly hold the choke valve closed, then open
the throttle valves to the wide open position. The
choke valve should open sufficiently to allow a
1d/,,4
inch drill or gauge T109-32 to be inserted between
the choke valve and the wall of the air horn as shown.
(2) To adjust, bend the tang on the throttle lever,
using Tool T109-214 until correct opening has been
obtained.
(3) Hold the choke valve open and then open and
close the throttle valves. Failure to obtain full throt-
tle
operation indicates improper assembly or adjust-
ment of the choke mechanism.
(4) With the throttle valves held in an open posi-
tion, the choke valve should fall open freely. There
should be no bind throughout the entire travel of the
choke mechanism.
Accelerator Pump Travel
To check the accelerator pump travel, refer to (Fig.
22) then proceed as follows:
(1) With the throttle valves fully closed, measure
the pump travel from the fully closed to the fully
open throttle.
(2) This travel should be
inch Manual Trans.
and
(3) If an adjustment is necessary, bend the pump
rod at the point shown, using Tool T109-213, until
correct travel has been obtained.
inch Auto. Trans. as shown.
Bowl Vent Valve Setting
23) then proceed as follows:
To make the bowl vent valve setting, refer to (Fig.
This setting is made after the pump travel setting.
(1) With the throttle valves at curb idle, there
should be
inch clearance between the bowl vent
valve and the air horn, when measured (at the center
of
the vent valve and the seat) with a gauge or drill
shank.
FROM FULLY
CLOSED
TO
WIDE
Fig. 22-Accelerator
Pump Travel
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