ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
c. Cleaning, Inspection, and Repair.
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WARNING
Solvent, Dry Cleaning P-D-680, Type II is flammable and moderately toxic to skin,
eyes and respiratory tract. Eye and skin protection required. Good general ventilation
is normally adequate.
Failure to observe this warning could result in personal injury or
death.
WARNING
Compressed air used for cleaning and drying purposes can create airborne particles
that may enter the eyes. Pressure shall not exceed 30 psig and use only with adequate
chip guards and chipping goggles. Failure to observe this warning could result in
personal injury or death.
Clean all parts in dry cleaning solvent (Federal Specification P–D-880) and dry with filtered
compressed air.
Clean all oil passages in crankshaft and connecting rods with a wire brush.
CAUTION
Use care to avoid damaging ring groove in pistons. Failure to observe this caution
could result in equipment damage.
Scrape carbon deposit from top and ring groove of piston.
Inspect crankshaft for cracks, nicks and scratches on bearing journals or other damage. Remove
minor nicks and scratches from bearing journals with crocus cloth. Clean to remove abrasive
residue.
Perform magnetic particle inspection of crankshaft in accordance with established procedures.
Remove minor nicks, burrs, and scratches from crankshaft bearing journals by polishing with crocus
cloth.
CAUTION
When regrinding crankshaft, it is imperative that the 5/32 inch radius from journal to
cheek be maintained. Crankshaft breakage may result from improper grinding of this
fillet. Failure to observe this caution could result in equipment damage.
Table 3-3. (UNDERSIZED BEARING JOURNALS)
Crankshaft journal diameter (In.)
Bearing
Size
Main Bearing
Connecting rod
Standard
2.8734/2.8744
2.3730/2.3740
0.020 inch
2.8534/2.8544
2.3530/2.3540
0.040 inch
2.8334/2.8344
2.3330/2.3340
0.060 inch
2.8134/2.8144
2.3130/2.3140
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