TM 10-4610-239-24
TM 08580B-24/3
2-25. CLEANING OIL PASSAGES. use soft wire (brass or copper) to clean oil passages. Always flush
passages thoroughly after cleaning.
WARNING
Compressed air can blow dust into the eyes. Wear eye
protection. Do not exceed 30 psi (207 kPa) air pressure.
2-26. STEAM CLEANING. If steam cleaning is used, dry cleaned parts immediately with compressed air and
apply thin film of clean oil to prevent rusting. Never use lye or caustic solutions that will corrode or etch metal
surfaces.
2-27. LUBRICANT IN NEW BEARINGS. Refer to TM 9-214 and LO 10-4610-239-12/ LI08580B-12 for
detailed lubrication and cleaning procedures. Bearings that have been in service should be relubricated.
2-28. CASTINGS, FORGINGS, AND MACHINED SURFACES.
a. Inspect all castings and forgings for breaks, cracks, and wear or scoring that would impair operation.
Remove nicks and small surface irregularities with crocus cloth or soft honing stone. Pay particular
attention to gasket surfaces. Cracked items should be replaced.
b. Inspect all oil passages for obstructions and dirt. Reclean passages if necessary.
c.
Inspect mounting faces of machined surfaces for nicks, scratches, and scores. Remove minor defects with
crocus cloth or soft honing stone. Replace any part with defects that cannot be corrected or which will
impair operations.
d. Inspect all threaded parts for damaged threads. Chase damaged threads with used tap or die of correct
size. Do not chase inserts. See insert replacement procedures in this chapter. If possible, worn tap or die
should be used because new tap may cut oversize and new die may cut undersize.
e. Replace housings and parts that are cracked or broken.
to TM 9-214 for proper cleaning and inspection procedures.
2-30. NEEDLE ROLLER BEARINGS. Inspect bearings for free and smooth rotation, broken or missing rollers,
and tightness of fit within bearing bores. Inspect bearing races for wear and discoloration due to heat. If defects
are found, replace bearing.
2-31. BUSHINGS, BUSHING-TYPE BEARINGS, AND THRUST WASHERS.
a. Inspect bushings and bushing-type bearings for size, scoring, out-of-roundness, burrs, sharp edges, and
evidence of seizing. Minor scores, sharp edges, and scratches can be removed with crocus cloth. Out-of-
round, deeply scored, or worn parts should be replaced.
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