Chevrolet Corvette 1963 Repair & Tune-Up Manual page 190

172 EMISSION CONTROLS AND FUEL SYSTEM
O-ring at the fuel meter end of the fuel line.
Remove the fuel meter from the injector unit.
4. Disassemble the air meter by remov
ing the air cleaner adapter, fast-idle cam pi
vot screw, difluser cone assembly, and pie
zometer ring from the air meter.
5. Remove the idle-speed and idle-fuel
adjusting screws. The throttle valve need not
be removed unless shaft binding exists.
6. Disassemble the fuel meter by remov
ing the diaphragm cover and shield. Care
fully remove the diaphragm retaining nut and
diaphragm from the control link. The control
link must be kept from rotating to prevent
damaging the control link.
7. Remove the nylon splash shield, the
fuel bowl cover attaching screws and care
fully lift the cover, upper support bracket, and
gasket from the meter body. Do not bend the
control link. Start the link into the slot, then
pry the opposite side upward and turn the
shield over the link.
8. Remove the fuel pump, enrichment
housing, and cranking signal valve. Remove
the spill plunger cover and filter, spill plunger
and sleeve assembly from the fuel meter bore.
If the spill plunger separates from the sleeve,
use a hooked wire to pull the sleeve out.
9. Remove the ratio lever and shaft. Ro
tate the control arm and counterweights on
the axle and remove the axle. Remove the
control arm and counterweight assembly from
the meter body. This will also remove the
lead sealing ball on the outer end of the axle
shaft.
10. The fuel pump is secured to the fuel
meter by 5 screws. Remove these, noting that
the shortest screw is positioned in the 9
o'clock position. With pump separated from
the fuel meter, scribe reassembly marks on
the pump housing.
11. Remove the cover attaching screws and
the cover. Hand pressure is sufficient to pull
the drive shaft from the pump drive gear and
housing. Use a suitable driver to remove the
drive shaft seal from the pump housing. Bear
in mind, the fuel meter contains 48 parts in
addition to screws. Be careful. Reassembly is
the reverse of this procedure.
12. Nozzles may be disassembled for
cleaning but care should be taken to ensure
correct reassembly. Never clean nozzle ori
fices with wire. If a nozzle is dirty, replace it.
Should more than one nozzle be found ex
ceptionally dirty, replace the fuel meter fil
ter. Replace nozzles only as complete assem
blies and according to the following chart:
13.
Nozzle Code
W 1 7 o r 1 8
X 1 8 o r 1 9
Y 1 9 o r 2 0
13. Begin disassembly by carefully discon-
necting and lifting the fuel lines out of the
way. Disconnect either the throttle bell crank
or fuel pump drive cable when removing
nozzles in their vicinity. Remove the nozzles
and nozzle blocks as complete assemblies.
Invert the blocks and remove the individual
nozzles. Carefully remove the old nozzle gas-
kets. Disassemble the unit by securing the
nozzle body and inserting a drift punch in the
head to turn it. Avoid damaging, losing, or
mixing parts. Remember: the nozzle orifice
discs are assembled with the bright side to-
ward the engine. After cleaning or replacing
nozzle assemblies, reinstall them in the noz-
zle block, using new gaskets. Check to see
that the nozzle gaskets remain in position
during reinstallation and that the nozzles are
properly placed in the nozzle shields. Reas-
sembly is the reversal of this procedure.
NOZZLE BODY
FILTER
AND
GASKET
Nozzle assembly
0
NOZZLE MUST PROTRUDE
FROM BLOCK
Nozzle block assembly
Part Number
7017323
7017324
7017325
DISC
GASKET
NOZZLE HEAD