Pontiac tempest 1968 Service Manual page 314

E N G I N E FUEL
6 B - 7
Fig. 6 B - 1 2 Removing Pump Discharge Guide
2. Remove idle screw from throttle lever if nec­
essary to replace.
„PUMP RETURN
SPRING
H
Fig. 6B-13 Removing Pump Plunger
Fig. 6 B - 1 4 Removing Pump Return Spring
NOTE: Due to close tolerance fit of throttle
valve in bore of throttle body, do not remove
throttle valve or shaft from throttle body.
CLEANING AND INSPECTION
1. Thoroughly clean carburetor castings and metal
parts in carburetor cleaning solvent.
CA UTION: Pump plunger and any synthetic or
plastic parts should not be immersed in commer­
cial carburetor cleaner. Clean in clean solvasol
or equivalent. Plastic vacuum break diaphragm
unit should not be immersed in any cleaner.
2. After cleaning, blow all passages and castings
with compressed air and blow out all parts until dry.
CAUTION: Do not pass drills or wires through
calibrated jets or orifices as this may enlarge
orifice and seriously affect carburetor calibration.
3. Check all parts for wear. If wear is noted,
defective part must be replaced.
NOTE: Especially the following:
a. Check float needle and seat for wear.
b. Check tang on float arm above float needle
for wear and floats for dents. Check floats for
leaks by shaking.
c. Check throttle and choke shaft bores in
throttle body and air horn castings for wear or
out of round.