NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 GENERAL MAINTENANCE, OVERHAUL, AND REPAIR PROCEDURES—Continued 0005 00 0005 00-4 Change 1 5. Inspection - Continued. c. Castings. (1) Inspect all ferrous (cast iron, steel, etc.) castings for cracks using magnetic particle method. Inspect all nonferrous (aluminum) castings for cracks using dye penetrant method. Check particularly the areas adjacent to studs, pipe plugs, or threaded inserts and in sharp corners and fillets. (2) Inspect machined surfaces of castings for nicks, burrs, or raised metal. Mark damaged areas for repair. (3) Check all mating flanges and mounting pads with a straight edge or surface plate for warpage. Inspect mating flanges and mounting pads for discoloration which may indicate persistent oil leakage. (4) Inspect all tapped openings for stripped or damaged threads. (5) Check all castings for conformance with the applicable OIP. d. Ball and Needle Bearings. NOTE Bearings are MRPs and are not intended to be reused during overhaul. The following information is provided for new bearing inspection. Refer to TM 9-214 for inspection of anti-friction bearings. e. Studs. Inspect all studs for damaged or stripped threads, bent or loose condition, or for any signs of stretching. f. Dowel Pins. Inspect dowel pins for looseness or damage. Mark loose pins for repair or replacement. g. Gears and Shafts. The following general inspection instructions apply to gears and shafts. (1) Inspect all gears and shafts for cracks using magnetic particle method. (2) Inspect all gear teeth and splines for wear, sharp fins, burrs, and galled or pitted surfaces. (3) Inspect shaft and gear hub splines for damage, wear, and fit with splines on mating parts. Mating splines must match without binding or looseness. (4) Check all gears and shafts for conformance with the applicable overhaul inspection procedures.