03-39
Auxiliary Systems
03-39
HOLLEY ONE-BARREL CARBURETOR MODEL 1940 (Continued)
Carburetor Body Disassembly
1.
Turn the carburetor body upside down and
remove the pump discharge ball and weight.
Save the old ball in case the seat needs staking.
-
PUMP DISCHARGE
WEIGHT y-CHECK BA;pDoo28
2.
Remove the fuel inlet valve and fitting assembly;
remove gasket. Remove spring float shaft
retainer, float shaft and float.
MA
BOII
FLOAT
SSEMBLY
FLOAT SHAFT
11
RETAINER
PPD0029
This completes the disassembly of the carburetor
body. Remove the three carburetor body-to-throttle-
body screws. Tap gently and separate the throttle body
from the main body.
Cleaning
Clean all parts in a carburetor cleaning solvent or
denatured alcohol. Do not place rubber or plastic parts
in the cleaning solution. During cleaning, the bowl
cover should be placed on top of the other parts in the
gasket with the main well tube projecting upward and
protected. It is a part of the bowl cover and cannot be
replaced. Blow out passages with low pressure air.
Assembly
Except for the following vacuum piston staking
operation, and testing the pump discharge valve,
reassembly is the reverse of disassembly.
NOTE: Before installing the vacuum piston assembly,
be sure to remove all previous staking from the
retainer recess. Install the piston in the vacuum
cylinder and stake lightly with a suitable tool.
MAIN JET
4
3.
Remove the main jet with a jet wrench. A 3/8”
wide square point screwdriver may be used.
JET WRENCH
PPD0030
4.
Remove the power valve assembly with a proper
socket or a 3/8” wide screwdriver blade with a
1 /I 6” x 3/8” deep slot sawed in the center of the
blade. The slot will clear the power valve stem
and prevent damage.
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