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 WARNING Air pressurized in excess of 30 psi (207 kPa) can injure personnel. Do not direct pressurized air at yourself or others. Always wear goggles. l. INSERTS. Blow out insert holes with compressed air. m. GASKETS. If a gasket is being removed, scrape old gasket material and sealant off mating surface. Clean mating surface with cleaning compound (WP 0782 00, Item 16). Dry with wiping rag (WP 0782 00, Item 76). 3. INSPECTION All removed parts must be inspected with care. Replace parts if damage or wear exceeds allowable limits. a. GENERAL. Procedures for inspection will be the same for most parts. General inspection procedures are given in steps b through p below. Special inspection procedures are covered in the task as needed. b. CASTINGS. 1) Inspect all castings and forgings for breaks, cracks, and wear or scoring that would impair function. 2) Inspect machined surfaces for nicks, burrs, and raised metal. Mark damaged areas for repair. 3) Use straightedge to check all mounting flanges on housings and supports for bends. Inspect mating flanges for stains which would indicate oil leakage. 4) Inspect all threaded parts for damaged or stripped threads. c. NEEDLE ROLLER BEARINGS. Inspect bearings for free and smooth rotation, and broken or missing rollers. Also look for tightness of fit in bearing bores. Inspect bearing races for wear and color changes due to heat. See TM 9-214 for inspection procedures. d. STUDS. Inspect all studs for stripped or damaged threads, bent or loose condition, and signs of stretching. e. GEARS. Inspect gears for burrs, wear, cracked or broken teeth, and pitting at tooth contact areas. f. BUSHINGS AND BUSHING-TYPE BEARINGS. 1) Check all bushings and bushing-type bearings for secure fit in casting. Check for color changes which could mean overheating. Inspect for size, scoring, out-of-roundness, burrs, sharp edges, and signs of seizing. 2) Check for dirt in oil holes and in bushing-type bearings. Oil holes and grooves must be clean and not damaged. g. OIL SEALS. 1) Inspect feather edge of oil seals for tears, fraying, hardening, and cracking. 2) Replace metal-covered oil seals when there are signs of damage or oil leakage. h. CORE HOLE PLUGS. Inspect core hole plugs for signs of leakage. Replace damaged core hole plugs. i. INSERTS. 1) Inspect inserts for cracks and stripped or damaged threads. 2) Check inserts for loose fit. 3) Inspect armor mounting inserts and hull screw holes for loose or missing plugs and setscrews, as required. 0120 00-9