TM 10-4930-351-14
UNIT MAINTENANCE
ADVANCED AVIATION FORWARD AREA REFUELING SYSTEM MODEL M100A1
UNIT TROUBLESHOOTING PROCEDURES
Troubleshooting Table 1 is provided to assist you in locating and correcting system faults. This table cannot list all the
malfunctions that may occur, all the tests and inspections needed to find the fault, or all the corrective actions needed to
correct the fault. If the equipment malfunction is not listed or actions listed do not correct the fault, notify your supervisor.
Table 1. Unit Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
SYSTEM
1. Unisex coupling leaks at interface with dust cap or other coupling.
Inspect coupling and dust cap face seals for physical damage or wear.
Replace damaged or worn coupling face seal. If you cannot tell by visual inspection which seal is bad, replace
both. The coupling face seal and the dust cap face seal are identical and may be interchanged as a temporary
repair.
2. Unisex coupling leaks at inlet.
Replace two inch coupling (WP 0027 00) or three inch coupling inlet O-ring (WP 0028 00).
AUXILIARY PUMP
1. Unisex coupling leaks at interface with dust cap or other coupling.
Inspect coupling and dust cap face seals for physical damage or wear.
Replace damaged or worn coupling face seal. If you cannot tell by visual inspection which seal is bad, replace
both. The coupling face seal and dust cap face seal are identical and may be interchanged as a temporary repair.
2. Unisex coupling leaks at coupling inlet.
Disconnect coupling from inlet. Replace inlet O-ring. (WP 0027 00)
3. Pump will not prime.
Check that inlet and outlet unisex valves are open.
4. Pump operates at low capacity.
Step 1. Check for blockage.
a.
Disconnect lines from inlet and outlet unisex couplings.
0013 00-1
