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TM 10-4320-351-14
TABLE 5-1. TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
FUEL TRANSFER PUMP
1.
Pump will not prime
Inspect vane pump.
a.
Disassemble rotary vane pump, inspect components for cuts, scratches, burrs, etc. and replace any that
are damaged. Refer to paragraph 5.4.4.
b.
Replace vane pump packings. Refer to paragraph 5.4.3.
2.
Pump leaks at inlet
Inspect inlet packing.
a.
Remove inlet.
b.
Check for debris around O-ring. Check physical condition of O-ring. Clean inlet or replace O-ring, as
required. Refer to paragraph 5.4.1.
3.
Pump leaks at input shaft
Inspect shaft seal and O-rings.
a.
Remove shaft seal housing.
b.
Replace shaft seal and O-rings. Refer to paragraph 5.4.2.
4.
Pump leaks at vane pump housing
Inspect vane pump O-rings.
a.
Remove vane pump housing.
b.
Replace vane pump housing O-rings. Refer to paragraph 5.4.3.
5.
Pump does not provide flow and pressure when engine is running.
Inspect pump.
a.
Disassemble pump. Refer to paragraph 5.4.4.
5-2
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