B250 3/4 Ton Van V8-360 5.9L (1984)
(1)
Remove air cleaner.
(2)
Disconnect all hoses from front of carburetor base.
(3)
Center punch at a point 1/4 inch from end of mixture screw housing.
(4)
Drill through at punch mark with 3/16 inch drill bit.
(5)
Repeat operation on opposite side.
(6)
Pry out plugs and save for reuse.
(7)
Reinstall hoses and air cleaner.
BOWL VENT VALVE ADJUSTMENT 2280
(1)
Remove bowl vent cover plate and vent valve lever spring. CAUTION: Do not dislodge or misplace vent valve lever retainer/pivot pin.
(2)
With the throttle in the curb idle position, press firmly down on the vent valve lever where the spring seats; with another finger of the same hand,
simultaneously press down on the vent valve tang until the vent valve is lightly seated (closed). CAUTION: If the carburetor is not on the engine,
it must be on a raised fixture so as not to change, the curb idle throttle plate position.
(3)
Using the other hand, measure the resulting gap between the contact surfaces of the vent valve lever and the vent valve tang with an appropriate
gauge.
(4)
Adjust by bending the end of the vent valve lever up or down until the specified gap (.030") is set.
(5)
Install vent valve lever spring and bowl vent cover plate.
NOTE:
THE BOWL VENT VALVE ADJUSTMENT MUST BE RESET IF THE ACCELERATOR PUMP ADJUSTMENT IS CHANGED.
Publication #81-370-6007
FIGURE 16 - SERVICING VACUUM POWER VALVE PISTON AND RETAINING RING
TSB 14-04-87 May 4, 1987 Publication #81-370-6007
tween fingers. If wetness appears on surface or float feels heavy (check with known good float), replace the float assembly.
(8)
Place a new gasket on fuel inlet fitting and install assembly into main body, tighten securely. Check float level. Refer to carburetor
adjustments for adjusting procedure.
