TM10-3930-660-34 (3) Check keyway slots for wear or damage. h.  Bushings and Bushing Type Bearings. (1) Check all bushings and bushing type bearings for secure fit, evidence of overheating, wear, burrs, nicks and out-of-round condition.  Replace as necessary. (2) Check for dirt in lubrication holes or grooves.  Holes and grooves must be clean and free from damage. i.  Oil Seals.  Oil seals are mandatory replacement items. j.  Core Hole Expansion Plugs.  Inspect for leakage.  Replace plugs when leakage is present. k.  Machine Tooled Parts.  Inspect for cracks, breaks, elongated holes, wear and chips.  Replace any damaged parts. 1.  Machined Surfaces.  Inspect for cracks, evidence of wear, galled or pitted surface, burrs, nicks, and scratches. m.  Mated Surfaces.  Inspect for remains of old gasket, seal, secure fit, pitting and evidence of leakage. n.  Rusted Surfaces.  Inspect for pitting, holes and severe damage. o.  Oil Bathed Internal Parts.  Inspect for cracks, nicks, burrs, evidence of overheating and wear. p.  Air Actuated Internal Parts.  Inspect for cracks, nicks, burrs, evidence of overheating and wear. q.  Externally Exposed Parts.  Inspect for breaks, cracks, rust damage and wear. r.  Springs.  Inspect for broken, collapsed and twisted coils. 2-12.REPAIR INSTRUCTIONS. a.    General.    Any  repair  procedure  peculiar  to  a  specific  part  or  component  is  covered  in  the  section  or  paragraph relating  to  that  item.    After  repair,  clean  all  parts  thoroughly  to  prevent  dirt,  metal  chips  or  other  foreign  material from entering any working parts. CAUTION Repaired  items  must  be  thoroughly  cleaned  to  remove  metal  chips  and  abrasives  to prevent them from entering working parts of the 6KVRRTFL. b.  Castings. (1) All cracked castings will be replaced. 2-22