ADVANCED AVIATION FORWARD AREA REFUELING SYSTEM MODEL M100A1
REPAIR AUXILIARY PUMP
Tool Kit, General Mechanic Automotive
Chemical and Oil Protective Gloves
Death or personal injury may result from the explosion of fuel fumes exposed to an open
flame or spark, or to static discharge. Do not permit smoking, any open flame, or spark
producing equipment within fifty (50) feet (15.24 m) of the auxiliary pump during repair.
This procedure assumes that the auxiliary pump has been defueled. However, some residual fuel
Inspect all components as they are disassembled. Repair is limited to replacement of unserviceable
components discovered during disassembly.
PUMP DISASSEMBLY AND INSPECTION
Rubber gloves should be worn when handling fueling system components due to the toxic
effects of some fuel additives.
Remove four bolts (1) that attach pump rotor cover (2). Remove cover (2).
Remove rotor cover gasket (3) and inspect for damage. Replace if damaged.
A new pump rotor vane is 7/16 in. high. Replace vane if height is 9/32 in. or less. A vane that
does not make good contact with pump chamber will cause loss of suction.
Remove the five vanes (4) from rotor (5). Inspect vanes (4) for damage and wear.
Remove rotor key (6). Inspect for damage or deformation. Replace if damaged or deformed.
Remove rotor (5). Inspect for damage. Scratches will not affect the rotor; however, burrs should be removed.