TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING LUBRICATION INSTRUCTIONS — Continued 0128 00 a. GENERAL. Procedures for inspection will be the same for most parts. General inspection procedures are given in steps b through q 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. 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 burs, 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, burs, 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. j. GREASE SEALS, PREFORMED PACKINGS, AND GASKETS. 0128 00-9 Change 1