1. General. All components and parts must be carefully checked to determine if they are serviceable for reuse, if
they can be repaired, or if they must be scrapped.
2. Drilled and Tapped (Threaded) Holes.
a. Inspect for wear, distortion (stretching), cracks, or any other damage in or around holes.
b. Inspect threaded areas for wear, distortion, or evidence of cross-threading.
Mark all damaged areas for repair or replacement.
3. Metal Lines, Flexible Lines (Hoses), and Fittings.
a. Inspect lines for sharp kinks, cracks, bends, or dents.
b. 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 fitting wrenches.
d. Mark all damaged material for repair or replacement.
a. 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
b. Inspect machined surfaces for nicks, burrs, or raised metal. Mark damaged areas for repair or replace-
Inspect all pipe plugs, pipe plug openings, screws, and screw openings for damaged or stripped threads.
d. 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.
5. Bearings. Refer to TM 9-214, Inspection, Care, and Maintenance of Antifriction Bearings, for inspection of
bearings. Damaged bearings must be replaced.
6. Studs, Bolts, and Screws. Replace if threads are damaged, bent, loose, or stretched.
When gear teeth wear limits are not established, good judgement is required to determine
if gear replacement is necessary.
a. Inspect all gears for cracks using a strong light. No cracks are permissible.
b. 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.
8. Bushing and Bushing-Type Bearings.
a. Check all bushings and bushing-type bearings for secure fit, evidence of overheating, wear, burrs, nicks,
and out-of-round condition. Replace as necessary.
b. Check for dirt in lubrication holes and grooves. Holes and grooves must be clean and free from damage.
9. Oil Seals. Oil seals are mandatory replacement items.
10. Core Hole Expansion Plugs. Inspect for leakage. Replace plugs when leakage is present.
11. Machine-Tooled Parts. Inspect for cracks, breaks, elongated holes, wear, and chips. Replace any damaged
12. Machined Surfaces. Inspect for cracks, evidence of wear, galled or pitted surface, burrs, nicks, and scratches.
13. Mating Surfaces. Inspect for remains of old gasket or seal, loose fit, pitting, and evidence of leakage.