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TM 55-2915-335-30&P
Table 2-2. Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. PUMP ASSEMBLY LEAKS FUEL
Step 1. Check packing grooves on cartridge.
Remove pump cartridge from housing
(paragraph 2-10). Remove preformed packings
from packing grooves. Run your finger along
the packing groove in the impeller housing.
Feel for any scratches or sharp edges that may
damage preformed packing. If no defects are
found, go to Step 2.
Replace or repair damaged im-
peller housing per instructions
and illustrations in paragraph
2-24.
Step 2. Check cartridge bore surfaces in pump
housing. Using a flashlight, visually inspect
cartridge bore surfaces in pump housing for
nicks, burrs, or scratches. Inspect exposed sur-
faces of housing for cracks. Visually check the
mounting flange for nicks, burrs, or scratches.
If no defects are found in pump housing/
mounting flange, go to Step 3.
If damaged, inspect and repair
pump housing/mounting flange
per instructions and illustra-
tions in paragraph 2-15.
Step 3.
Check packing seal between inlet
shutoff valve stem and pump housing. Remove
and inspect shutoff valve (paragraph 2-14).
Visually check valve stem and packing groove
in pump housing for burrs or scratches. If not
defective, go to Step 4.
If damaged, replace or repair
pump housing or valve stem per
instructions and illustrations in
paragraph 2-14.
Step 4. Check for faulty seal between pump
cover and impeller housing. Remove, clean,
and inspect pump cover per paragraph 2-21.
Check condition of packing groove.
If defective, repair or replace
per instructions and illustra-
tions in paragraph 2-21.
2-19
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