DIRECT SUPPORT MAINTENANCE
ADVANCED AVIATION FORWARD AREA REFUELING SYSTEM MODEL M100A1
REPLACE FUEL TRANSFER PUMP PN 8424 SHAFT SEAL ASSEMBLY/O-RINGS
Compound, Anti-Seize, Molybdenum Disulfide
Key, Socket Head Screw, 3/16"
Wrench, Combination, 1-1/16"
Adapter, Crow Foot
Screwdriver, Flat Blade, 1/4" x 4"
Two, any MOS
Wire, Twister, Plier
Plier, Diagonal Cutting
Fuel transfer pump defueled
Lay fuel transfer pump on inlet side.
Remove safety wire from shaft nut cover screws (1).
Remove the four screws (1) and flat washers (2) that secure the shaft nut cover (3) to the seal housing (4). Remove the
Install splined flexible coupling adapter (5) and key (6) on pump shaft.
Removal of the fuel transfer pump shaft nut will require two persons. The nut is torqued
to 100-110 ft lb (135-149 Nm) and may require one person to hold the strap wrench and
one person to turn the nut.
Position strap wrench around splined flexible coupling adapter (5) as near to set screw as possible to hold pump shaft.
Loosen shaft nut (7) as far as possible without jamming the nut against the splined flexible coupling adapter.
Remove the flexible coupling adapter (5).
Remove the shaft nut (7) and flat washer (8).
Remove safety wire from seal housing screws (9).
Remove the five seal housing screws (9) and flat washers (10); remove the shaft seal housing (4).