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6C-60
1977 PONTIAC SERVICE MANUAL
C A UTI 0 N : Use care in removing small roll pin
to prevent damage to pump lever casting bosses in
air horn.
Fig. 6C-109 Removing Pump Lever
Fig. 6C-107 Removing Upper Choke Lever
Fig. 6C-108 Removing Secondary Metering Rods
5. Remove nine air horn to bowl attaching screws; two
attaching screws are located next to the venturi. (Two long
screws, five short screws, and two countersunk screws.) (Fig.
6C-110) Remove secondary air bame deflector from beneath
the two center air horn screws (where used).
6. Remove air horn from float bowl by lifting straight
up. The air horn gasket should remain on the float bowl for
removal later (Fig. 6C-111).
CAUTION: When removing air horn from float
bowl, use care to prevent bending the small tubes
protruding from the air horn. These tubes are
permentntly pressed into the air horn casting. DO
NOT REMOVE.
Fig. 6C-1 10 Air Horn Screws
Air Horn
Disassembly
Remove front vacuum break attaching screws. The
diaphragm assembly may now be removed from the air valve
dashpot rod and the dashpot rod from the air valve lever (Fig.
6C-112). Do not place vacuum break assembly in carburetor
cleaner.
Further disassembly of the air horn is not required for
cleaning purposes. If part replacement is required, proceed
as follows:
1. Remove staking on two choke valve attaching screws,
then remove choke valve and shaft from air horn.
2. Secondary air valves and air valve shaft should not
be removed.
3. If it is necessary to replace the air valve closing spring
or center plastic eccentric cam, a repair kit is available. (Part
Number 7035344) or equivalent. Instructions are included in
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