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10-10
have stripped threads. Replace all
distorted or broken springs.
Inspect all gasket mating surfaces
for nicks and burrs. Repair or re-
place any parts that have a damaged
gasket surface.
Inspect the idle tubes in each noz-
zle bar assembly.
If
they are plugged,
bent, or broken, replace the booster
venturi and nozzle bar assembly.
Check the remaining internal com-
ponents of the carburetor and re-
place any that are bent, worn, crack-
ed or restricted.
FUEL PUMP
Clean the pump body and the
cover in solvent. Blow out all cover
passages. Inspect the body and cover
for cracks or damage and replace
them if necessary. Inspect the staked
areas around the valve and seal
counterbores for high spots which
may cause distortion of the new
parts upon installation. Remove a1l
high spots. Inspect the mounting
flange for distortion. Replace the
pump body or lap the distorted
flange, if necessary.
VAPOR DISCHARGE VALVE
Thoroughly flush the valve as-
sembly in clean commercial car-
buretor cleaning solvent. If a com-
mercial solvent is not available, lac-
quer thinner or denatured alcohol
may be used.
GROUP 10-FUEL SYSTEM
Rinse the valve assembly in kero-
sene to remove all traces of the
cleaning solvent, then dry it with
compressed air. Be sure all dirt,
carbon, and other foreign matter
are removed from the part.
Manually move the vapor valve
stem back and forth to verify that
there is no sticking of the valve stem
in its guide. If a sticking or binding
condition exists, and it cannot be
eliminated by flushing the assembly
in solvent, the valve assembly must
be replaced. The valve unit should
not be disassembled in an attempt
to clean it as the adjustment of
the thermostatic setting is critical,
and the unit is permanently sealed
at the time of manufacture.
AIR CLEANER
MAINTENANCE
Refer to Group 19 for the recom-
mended air cleaner assembly mainte-
nance mileage interval.
REMOVAL AND
INSTALLATION
Refer to Part 10-3 for the air
cleaner assembly removal and instal-
lation procedures.
FILTER ELEMENT
The filter element must never be
cleaned with a solvent or cleaning
solution. Also, oil must not be
added to the surfaces of the filter
element or air cleaner body.
(214)
There are two alternate procedures
that can be used to clean the air
filter element. One method
is
per-
formed with the use of compressed
air. The other is performed by
tapping the element on a smooth
horizontal surface.
Compressed Air Method. Direct
a stream of compressed air through
the element in the direction opposite
that of the intake air flow, that is
from the inside outward. Extreme
care must be exercised to prevent
rupture of the element material.
Tapping Method. Hold the ele-
ment in a vertical position and tap
it lightly against a smooth, horizon-
tal surface to shake the dust and
dirt out. Do not deform the ele-
ment or damage the gasket sur-
faces by tapping too hard. Rotate
the filter after each tap until the
entire outer surface has been cleaned.
Inspection. Hold the filter in front
of a back-up light and carefully in-
spect it for any splits or cracks. If
the filter is split or cracked, replace
it.
BODY AND COVER
Clean the air cleaner body and
cover with a solvent or compressed
air. Wipe the air cleaner dry if a sol-
vent is used. Inspect the air cleaner
body and cover for distortion or
damage at the gasket mating sur-
faces. Replace the cover or body if
they are damaged beyond repair.
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Troubleshooting
