CHRYSLER SERVICE MANUAL
FUEL
AND
EXHAUST SYSTEM—7
INTEGRAL AUTOMATIC CHOKE
CHOKE VALVE
ROCKER
ARM
ACCELERATOR
PUMP PLUNGER
FUEL INLET NEEDLE
VALVE
AND
SEAT
MAIN BODY
IDLE MIXTURE
ADJUSTING NEEDLES
(2)
THROTTLE BODY
REPAIR STAND
AIR HORN
CHOKE SHAFT LOOSE LEVER
CHOKE SHAFT LEVER
FAST IDLE
ROD
PUMP CONNECTOR
ROD
FAST IDLE
CAM
IDLE SPEED SCREW
FAST IDLE SCREW
THROTTLE SHAFT
LOOSE LEVER
THROTTLE LEVER
56x258A
Fig.
5-Carburetor Assembly (BBD-2685S)
SERVICE PROCEDURES
15.
REMOVAL
OF
CARBURETOR
FROM ENGINE
Remove air cleaner, gasket, fuel line, choke
heat tube and vacuum spark advance tube. Dis-
connect throttle linkage, remove the carburetor
from intake manifold. Discard mounting flange
gasket.
The carburetor must be disassembled, all
parts carefully cleaned in suitable solvent, such
as "Metalclene" or equivalent. Inspect all parts
for damage or wear and replace as necessary.
16.
CARBURETOR DISASSEMBLY (FIG. 6)
Place carburetor assembly on repair stand
Tool C-3225, (if available). This Tool is used
to protect throttle valves from damage and
provide a suitable base for working. Remove
hair pin clips that retain fast idle and pump
connector rods, disengage from choke and
throttle levers, as shown in Figure 7. Remove
air horn and integral automatic choke, as
shown in Figure 8, discard gasket. Remove
fuel inlet needle valve, seat, gasket and float
fulcrum pin retainer. Lift out floats, as shown
in Figure 9. Remove step-up piston screw, lift
step-up piston and rods up out of carburetor
bowl, as shown in Figure 10. Remove step-up
piston spring and gasket from piston cylinder.
Remove main metering jets and gaskets, as
shown in Figure
11.
Remove vented screws that
attach venturi cluster to main body. Lift cluster
up and away from carburetor, as shown in
Figure 12, discard cluster gaskets. Invert car-
buretor and drop out the discharge check ball.
The metering of fuel from accelerator pump
is controlled by two drilled holes in the venturi
cluster. Be sure these holes are clean.
Do not remove the idle orifice or main vent
tubes from the venturi cluster. They can easily
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