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TM 10-4320-324-14
6-7. Engine Assembly Repair (CONT).
b. Cleaning/Inspection.
WARNING
Potential health hazards result from inhalation of petroleum solvent vapors and form contact of solvent
with skin. Use rubber gloves and hand cream for protection, and work with adequate ventilation.
WARNING
Petroleum solvents are highly flammable. Keep solvent container lids closed when not in use, and avoid
all possible risks of igniting solvent vapors, keep away from open flame and excessive heat. Flash point
of solvent is 100 to 138 degrees F (38 to 59 degrees C).
(1) Clean all metal parts in solvent P-D-680, Type II. Dry thoroughly.
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding
and personal protective equipment (goggles/shield, gloves, etc).
(2)
Blow clean compressed air through oil nozzle and bushing oil holes.
(3)
Clean all tapped holes in crankcase by running down a tap. A greased tap should be used for blind holes.
(4)
Clean all plastic and rubber parts with a dry, lint free cloth.
(5)
Discard all fasteners that are loaded such as lockwashers.
(6)
Discard all used gaskets.
(7)
Inspect bushings for galling or excessive wear. Replace if defective.
(8)
Inspect studs for damage. Replace if defective.
(9)
Inspect stop rings for defects. Replace if defective.
(10) Check valve tappets (83) for excessive wear (contacting face must be convex) and oil hole is not obstructed.
(11) Inspect cylinder head parts for obvious defects. Replace defective parts.
(12) Measure valve springs length. Minimum length is 2.204 inch (56 mm). Replace if less than minimum length.
6-18
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