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ROCHESTER CARBURETORS Bulletin 9D-9 January 1952 |
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Page 13 13
ROCHESTER PRODUCTS, DIVISION OF GENERAL MOTORS, ROCHESTER, NEW
YORK |
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AIR HORN |
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ATTACHING SCREW LOCATED AT END OF
DIVIDING WALL |
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Figure 7-12
14. Remove two choke housing to air horn attaching screws. Then remove choke housing and gasket
from air horn. (Figure
7-11.)
15. Remove cotter pin from pump plunger rod and
remove inside pump
lever.
16. Remove 13 air horn attaching screws and lock washers. (Figure 7-12.)
17. Carefully remove air horn from float bowl.
Lift straight up until float
assemblies clear carburetor bowl. (Figure 7-13.)
18. Remove float hinge pin and float and needle
assembly from inlet side
(secondary). Then remove float
needle from float assembly. NOTE: Group and keep floats, needle, needle
seat, and gaskets together as
units. NEVER MIX FLOAT NEEDLES AND SEATS.
19. Remove needle seat and gasket from inlet
side of carburetor.
20. Remove balance
spring and clips from inlet side of carburetor.
21. Remove float hinge pin and float and needle
assembly from pump side (primary). Then remove float needle from float
assembly.
22. Remove needle
scat and gasket from pump side of carburetor.
23. Remove balance spring and clips from pump
side of carburetor:
24. Rotate
power piston retaining washer and remove |
Figure 7-13 |
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PUMP PLUNGER
ASSEMBLY
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RUBBER SEAL |
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Figure 7-14 |
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power
piston and actuating spring.
25. Remove rubber seal and plunger assembly
from air horn. Then remove rubber sea! from pump
plunger assembly. (Figure 7-14.)
26. Remove air horn
gasket. |
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FLOAT BOWL DISASSEMBLY |
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Remove three attaching screws and
lock washers from Venturi cluster on pump side of carburetor. Then
carefully remove cluster and gasket. NOTE: The venturi cluster on
the pump side contains the pump discharge nozzles and must always
he installed on the pump side of the
carburetor. The Venturi clusters also carry the idle tubes and
main well tubes and are serviced as
complete as- |
semblies. If necessary, remove
the brass vent valve from the primary Venturi cluster by tapping from the
underside with a 1/16" punch or
rod. If this valve is removed, be
certain to replace it with a new one, as the original will be
damaged during disassembly.
Remove both Main Metering Jets
from the pump side of the carburetor bowl. As these jets differ
in |
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