PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING
LUBRICATION INSTRUCTIONS Continued
Blow out all tapped holes and armor mounting inserts with compressed air.
BALL BEARINGS. Bearings require special cleaning techniques. See TM 9-214 for cleaning and maintenance
procedures for ball bearings.
Make sure all oil passages are not clogged.
Clean oil passages and break up any sludge or gum deposits.
Flush oil passages with cleaning compound (WP 0122 00, Item 8). Dry parts with compressed air.
OIL SEALS, ELECTRICAL CABLES, AND FLEXIBLE HOSES. Clean seals, cables, and flexible hoses with
detergent (WP 0122 00, Item 14) and water. Dry parts with wiping rag (WP 0122 00, Item 36).
INSERTS. Blow out insert holes with compressed air.
GASKETS. If gasket is being removed, scrape old gasket material and sealant off mating surface. Clean mating
surface with cleaning compound (WP 0122 00, Item 8). Dry with wiping rag (WP 0122 00, Item 36).
All parts must be inspected with care. Replace parts if damage or wear exceeds allowable limits.
GENERAL. Procedures for inspection will be the same for most parts. General inspection procedures are given in
the following steps. Special inspection procedures are covered in the task as needed.
Use magnetic particle inspection equipment to check ferrous castings for cracks. Use a magnifying glass and
strong light to check nonmetal castings for cracks. Check areas next to studs, threaded inserts, sharp corners,
Inspect all castings and forgings for breaks, cracks, and wear or scoring that would impair function.
Inspect machined surfaces for nicks, burrs, and raised metal. Mark damaged areas for repair.
Use straightedge to check all mounting flanges on housings and supports for bends. Inspect mating flanges for
stains which would indicate oil leakage.
Inspect all threaded parts for damaged or stripped threads.
ROLLER AND BALL BEARINGS. Inspect bearing races for wear and color changes due to heat. See TM 9-214
for inspection procedures for ball bearings.
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.
STUDS. Inspect all studs for stripped or damaged threads, bent or loose condition, and signs of stretching.
Use magnetic particle inspection equipment to check all gears for cracks.
Inspect gears for burrs, wear, cracked or broken teeth, and pitting at tooth contact areas.
BUSHINGS AND BUSHING TYPE BEARINGS.
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.
Check for dirt in oil holes and in bushing type bearings. Oil holes and grooves must be clean and not damaged.