MECHANICAL GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
INSPECTION INSTRUCTIONS - CONTINUED
Metal Lines, Flexible Lines (Hoses), and Fittings.
Inspect lines for sharp kinks, cracks, bends, or dents.
Inspect flexible lines for fraying, evidence of leakage, or loose fittings or connectors.
Check all fittings and connectors for thread damage. Check for hex heads that are worn or rounded by poorly fit-
Mark all damaged material for repair or replacement.
Inspect all ferrous and nonferrous castings for cracks using a magnifying glass and strong light. Particularly check
areas around studs, pipe plugs, threaded inserts, and sharp corners. Replace all cracked castings.
Inspect machined surfaces for nicks, burrs, or raised metal. Mark damaged areas for repair or replacement.
Inspect all pipe plugs, pipe plug openings, screws, and screw openings for damaged or stripped threads.
Check all gasket mating surfaces, flanges on housings, and supports for warpage with a straightedge or surface
plate. Inspect mating flanges for discoloration that may indicate persistent oil leakage.
Bearings. Refer to TM 9-214, Inspection, Care, and Maintenance of Antifriction Bearings, for inspection of bearings.
Damaged bearings must be replaced.
Studs, Bolts, and Screws. Replace if threads are damaged, bent, loose, or stretched.
N OT E
When gear teeth wear limits are not established, good judgement is required to determine if gear replace-
ment is necessary.
Inspect all gears for cracks using a magnifying glass and strong light. No cracks are permissible.
Inspect gear teeth for wear, sharp fins, burrs, and galled or pitted surfaces.
Check keyway slots for wear or damage. If keyways are worn, damaged, or elongated, replace gear.
Bushing and Bushing Type Bearings.
Check all bushings and bushing type bearings for secure fit, evidence of overheating, wear, burrs, nicks, and out-
of-round condition. Replace as necessary.
Check for dirt in lubrication holes or grooves. Holes and grooves must be clean and free from damage.
Oil Seals. Oil seals are mandatory replacement items.
Core Hole Expansion Plugs. Inspect for leakage. Replace plugs when leakage is present.
Machine-Tooled Parts. Inspect for cracks, breaks, elongated holes, wear, and chips. Replace any damaged parts.
Machined Surfaces. Inspect for cracks, evidence of wear, galled, or pitted surface, burrs, nicks, and scratches.
Mating Surfaces. Inspect for remains of old gasket, seal, secure fit, pitting, and evidence of leakage.
Rusted Surfaces. Inspect for pitting, holes, and severe damage.
Oil-Bathed Internal Parts. Inspect for cracks, nicks, burrs, evidence of overheating, and wear.
Internal Parts. Inspect for cracks, nicks, burrs, evidence of overheating, and wear.
Externally Exposed Parts. Inspect for breaks, cracks, rust damage, and wear.
Springs. Inspect for broken, collapsed, and twisted coils.