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Page Title: REPAIR.
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TM 10-4320-342-24 3-19.  PUMP AND CLUTCH (600 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 3-12. (3) Inspect inducer (8) for cracks, missing vanes and corrosion. (4) Inspect  the  labyrinth  grooves  on  the  upper  and  lower  wear  ring  surfaces  of  the  impeller  (12).    If  either  of  these surfaces has worn smooth, the impeller should be replaced. (5) Inspect suction manifold (6) and clutch housing (7) for cracks, corrosion, stripped threads or excessive wear and worn or damaged bearing seats.  Inspect wear ring for wear.  Tolerance differences between the inside diameter of the wear ring on suction manifold and outside diameter of the wear ringing on impeller should not exceed 0.024 inches for 200 GPM or 0.026 inches for 600 GPM. (6) Inspect all attaching hardware (bolts, nuts, screws and studs) for stripped or damaged threads, cracks and burrs. Refer to Figure 3-13. (7) Inspect clutch carrier (10) for cracks, corrosion and worn or damaged bearing seats. (8) Inspect bearing retainers (9 and 23) for cracks, corrosion and excessive wear. (9) Inspect clutch armature (17) and carrier armature (18) for cracks, excessive wear and glazing. (10) Inspect hub armature (20) for cracked or broken splines and corrosion. (11) Inspect shaft (2) for cracks, signs of wear, damage, worn keyways or discoloration. (12) Inspect all attaching hardware (bolts, nuts and inserts) for stripped threads, cracks or burrs. 3-38

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