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TM 10-4320-342-24
3-20. PUMP AND CLUTCH (200 GPM FUEL PUMP) REPAIR - continued.
b. REPAIR.
WARNING
Dry cleaning solvent, P-D-680, Type III, is potentially dangerous to personnel and
equipment. Eye and skin protection is required. Avoid repeated and prolonged
skin contact. Wash immediately after exposure. Do not use near open flame or
excessive heat. Use only in area with good ventilation.
(1)
Using wiping rags and cleaning solvent, remove dirt and contaminants from all components.
CAUTION
Do not use crocus cloth to clean aluminum parts. Crocus cloth contains iron
oxide which causes rapid corrosion of aluminum.
(2)
Dry parts with clean wiping rag.
Refer to Figure 3-21.
(3)
Inspect inducer (4) for cracks, missing vanes and corrosion.
(4)
Inspect the labyrinth grooves on the upper and lower wear ring surfaces of the impeller (13). If either of these
surfaces has worn smooth, the impeller should be replaced.
(5)
Inspect suction manifold (9) and pump case (10) for cracks, corrosion, stripped threads or excessive wear and
worn or damaged bearing seats. Inspect wear ring for wear. Tolerance between inside diameter of wear ring on
suction manifold and wear ring on impeller ring should not exceed 0.024 inches.
(6)
Inspect all attaching hardware (bolts, nuts, screws and studs) for stripped or damaged threads, cracks and burrs.
(7)
Replace gasket (11) and preformed packing (19).
(8)
Replace seal (15) and seal (16) with seal assembly.
Refer to Figure 3-22.
(9)
Inspect bearing carrier (3) for cracks, corrosion and worn or damaged bearing seats.
(10)
Inspect bearing retainers (23 and 40) for cracks, corrosion and excessive wear.
(11)
Inspect clutch armature (16) and clutch carrier (17) for cracks, excessive wear and glazing.
(12)
Inspect hub armature (11) for cracked or broken splines and corrosion.
3-55
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