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TM 5-4210-220-34
p.
Complex Components
Components that consist of a fabrication with passages and cavities should be checked thoroughly after
cleaning. A thin flexible wire should be run through all passages to ensure they are not blocked. Individual
passages may be cleaned using a pressure spray gun and dry cleaning solvent (item 10, Appendix B)
2-7.3
General Inspection Instructions.
a.
Sealing Surfaces
Check all contact surfaces of gaskets, packings, or seals. Ensure there are no nicks, burrs, or scratches.
These might damage new seals during assembly.
b.
Ball and Roller Bearings
Check bearings for pitted balls, races, or separator. Bearings shall be rejected if any of the following are
seen in the race load area:
(1)
Cuts or grooves parallel to ball or roller rotation.
(2)
Fatigue pits (not minor machine marks or scratches).
(3)
Cracks found during magnetic particle inspection
(4)
Serious abrasion of balls or rollers.
(5)
Serious discoloration of any part of the bearing.
c.
Drain Plugs
When removing drain plugs from transmission, engine, or axles, inspect the plug. A build-up of grit and/or
fine metal particles may indicate part failure. A few fine particles are normal.
d.
Tubing and Hoses
Check all hose surfaces for broken or frayed fabric. Check for breaks or weak points due to kinking or
rubbing. Inspect metal tube lines for kinks or excessive corrosion. Inspect fitting threads or clamps for
damage. Replace any faulty part. After assembly, check all disturbed joints for leaks.
e.
Splines
Inspect shaft splines for wear. This will include pitting, peening or fatigue cracks. Perform magnetic particle
inspection if needed.
f.
Electrical Parts
Inspect all wiring for chaffed or burned insulation. Check all terminals for tightness Check all lamps for
failure. Check for burns, or broken fittings or components
g.
Gears
The following steps should be used to make a general visual inspection of all gears. Specific tests for
particular gears, outlined in the text, should also be carried out. If any gear looks faulty, perform a surface
temper and/or magnetic particle inspection.
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