Compressed air used for cleaning and drying purposes shall not exceed 30 psi. Use only with effective chip guarding
and personal protective equipment (goggles/shield, gloves, etc.). Flying debris could cause personal injury.
Do not use scrapers, wire brushes, abrasive wheels, or compounds in cleaning parts, unless called for in detailed
instructions. These procedures may weaken a highly stressed part.
b. Removing Deposits. After soaking parts in solvent, wash away deposits by flushing or spraying. Where
necessary, brush with soft-bristle brush moistened in solvent. Use compressed air to dry all parts, except bearings.
Bearings must be allowed to air dry.
c. Bearings. When cleaning bearings, place them in basket and suspend in container of drycleaning solvent. If
needed, use brush to remove caked grease, chips, etc. Avoid rotating bearing before solid particles are removed to
prevent damaging races and balls. When bearings have been cleaned, coat lightly with lubricating oil (item 38, Appendix
Inspection consists of checking for defects such as distortion, wear, cracks, and pitting. Parts under heavy load or
pressure must be inspected more thoroughly. Clean all parts before inspection.
a. Sealing Surfaces. Inspect all surfaces in contact with gaskets, packings, or seals. Make sure there are no
nicks, burrs, or scratches. If any defect is found, remove or repair it as outlined in General Repair Instructions (para 1-
b. Bearings. Check bearings for rusted or pitted balls, races, or separators. Check balls and races for brinnelling,
abrasion, and serious discoloration. Following are causes for bearing
(1) Cuts or grooves parallel to ball or roller rotation.
(2) Fatigue pits (not minor machine marks or scratches).
c. Drain Plugs. When removing drain plugs, inspect sediment adhering to plug. Buildup of grit and/or fine metal
particles may indicate part failure. A few fine particles are normal.