Pontiac tempest 1968 Service Manual page 326

E N G I N E FUEL
6B-19
Fig. 6B-41 A i r Horn Removal
8. Remove power piston (Fig. 6B-42) by depress­
ing piston stem and allowing it to snap free or by
holding stem and tapping lightly on air horn with a
CHOKE STOVE FRESH
AIR SUPPLY -
INNER PUMP ARM
OUTER PUMP /
{
.
LEVER AND
SHAFT
CHOKE VALVE
1 I
POWER PISTON
/ /
W^i
7
FLOAT
HINGE PIN
PUMP PLUNGER ASSY.
FLOAT NEEDLE SEAT
VENTURI
CLUSTER «
4 .
<-
POWER
VALVE
PUMP
-RETURN
SPRING
PUMP
-INLET
SCREEN
Fig. 6B-43 Carburetor Body Details
nonmetallic object. Use care not to bend piston
stem.
9. Remove retainer on pump plunger shaft, remove
plunger assembly from pump arm. The pump lever
and shaft may be removed by loosening set screw on
inner arm and removing outer lever and shaft.
10. The cover gasket may now be removed.
11. Remove two choke valve attaching screws, then'
remove choke valve.
12. Remove choke valve shaft from bowl cover.
DISASSEMBLY OF BOWL
1. Remove pump inlet filter screen and pump
plunger return spring, and remove aluminum check
ball from bottom pump well (Fig. 6B-43).
2. Remove main metering jets and power valve
(Fig. 6B-43).
3. Remove three screws holding cluster to bowl
and remove cluster and gasket.
4. Using a pair of long nose pliers, remove pump
discharge spring retainer (Fig. 6B-44). Then spring
and check ball may also be removed.
5. Invert carburetor and remove three large bowl
to throttle body attaching screws. Throttle body and
gasket may now be removed.
6. Remove fast idle cam and fast idle link as an
assembly. DO NOT disassemble.
DISASSEMBLY OF THROTTLk BODY
Fig. 6B-42 Bowl Cover Attaching Parts
1. Remove idle adjusting needles and springs.