TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING LUBRICATION INSTRUCTIONS — Continued 0120 00 j. GREASE SEALS, PREFORMED PACKINGS, AND GASKETS. 1) Inspect composition seals, rings, and preformed packings for wear, brittleness, cracks, cuts, and damage. 2) Inspect lip seals for cracks, wear, cuts, and brittleness. Inspect springs and seal shells for damage. 3) Gaskets and seals on electrical parts may be reused. Inspect gaskets and seals for wear, nicks, cuts, and torn or missing gasket material. Replace gasket, if needed. k. SPLINED PARTS. Inspect splined parts for burrs, wear, twisted, cracked, or broken splines. l. THREADED PARTS. Inspect all threaded parts for burrs and stripped or damaged threads. m. RETAINING RINGS. Inspect retaining rings for nicks, burrs, defects, loss of tension, and wear. n. SPRINGS. Inspect springs for wear, defects, breaks, and loss of tension or compression. Inspect springs using a spring tester. o. SHAFTS AND SPINDLES. Inspect shafts and spindles for excessive wear, binding, scores, cracks, burrs, and obstructed oil passages. p. ELECTRICAL PARTS. 1) Inspect electrical parts before you install them. Look for mildewed, corroded, or burned parts. 2) Inspect electrical parts for pinched or loose wires and for cracked or broken wires, circuit cards, relays, and connectors. 3) Inspect insulation and heatshrink tubing for cracks, tears, burns, or missing material. 4. REPAIR a. GENERAL. General repair procedures are given in steps b through m below. Special repairs are covered in the task. After repair, clean all parts well. b. CASTINGS. 1) Replace all cracked or broken castings. 2) Repair minor damage to machined surfaces of castings with crocus cloth (WP 0782 00, Item 1). Replace any part with defects that cannot be corrected or which will impair function. 3) Repair minor surface bends by working bent surface of casting across sheet of crocus cloth (WP 0782 00, Item 1) on surface plate. Replace bent castings which would impair assembly or function. c. BALL BEARINGS. See TM 9-214 for inspection and maintenance for ball bearings. d. NEEDLE ROLLER BEARINGS. See TM 9-214 for inspection and maintenance of needle roller bearings. e. BUSHINGS AND BUSHING-TYPE BEARINGS. Replace bushings and bushing-type bearings if they are loose, scored, or have color change due to heat. When you replace bushings and bushing-type bearings, check nearby parts for damage or wear. f. OIL SEALS. Oil seals must be replaced when thin feather edge is damaged or when seal material is brittle. 1) Press damaged oil seal from casting. Be careful not to damage bore. 2) When oil seal bore is damaged so an oil-tight seal is impossible, replace casting or adapter. Remove slight nicks, burrs, and scratches with crocus cloth (WP 0782 00, Item 1) dipped in cleaning compound (WP 0782 00, Item 16). g. GREASE SEALS, PREFORMED PACKINGS, GROMMETS, AND GASKETS. Seals, preformed packings, grommets, and gaskets should be replaced when removed unless otherwise stated in the maintenance task. They should not be reused. h. THREADED PARTS. Repair all parts that have stripped or damaged threads by chasing threads with a used tap or die. Replace parts that cannot be repaired. 0120 00-10