INSPECTION INSTRUCTION

TM 10-3930-673-20-2

3-6. INSPECTION INSTRUCTIONS (CONT)

(5)

Inspect all pipe plugs, pipe plug openings, screws, and screw openings for damaged or stripped threads.

(6)

Check all gasket mating surfaces, flanges on housings, and supports for warpage with a straightedge or surface

plate. Inspect mating flanges for discolorations that may indicate persistent oil leakage.

(7)

Check all castings for conformance to applicable repair standards.

e. Bearings. Refer to TM9-214 for inspection of bearings. Check all bearings for conformance to applicable repair

standards.

f. Studs, Bolts, and Screws. Replace if threads are damaged, bent, loose or stretched.

g. Gears.

NOTE

When gear teeth wear limits are not established, good judgement is required to determine if gear

replacement is necessary.

(1)

Inspect all gears for cracks using a magnifying glass and strong light. No cracks are permissible.

(2)

Inspect gear teeth for wear, sharp fins, burrs, and galled or pitted surfaces.

(3)

Check keyway slots for wear or damage.

h. Bushings and Bushing Type Bearings

(1)

Check all bushings and bushing type bearings for secure fit, evidence of overheating, wear, burrs, nicks and out-

of-round condition. Replace as necessary.

(2)

Check for dirt in lubrication holes or grooves. Holes and grooves must be clean and free from damage.

i. Oil Seals. Oil seals are mandatory replacement items.

j. Core Hole Expansion Plugs. Inspect for leakage. Replace plugs when leakage is present.

k. Machine Tooled Parts. Inspect for cracks, breaks, elongated holes, wear and chips. Replace any damaged parts.

l. Machined Surfaces. Inspect for cracks, evidence of wear, galled or pitted surface, burrs, nicks, and scratches.

m. Mated Surfaces. Inspect for remains of old gasket, seal, secure fit, pitting and evidence of leakage.

n. Rusted Surfaces. Inspect for pitting, holes and severe damage.

o. Oil Bathed Internal Parts. Inspect for cracks, nicks, burrs, evidence of overheating and wear.

p. Air Actuated Internal Parts. Inspect for cracks, nicks, burrs, evidence of overheating and wear.

q. Externally Exposed Parts. Inspect for breaks, cracks, rust damage and wear.

r. Springs. Inspect for broken, collapsed and twisted coils.

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