TM 10-3930-669-20 2-24.  GENERAL INSPECTION INSTRUCTIONS . a. Cleaning.  Clean all parts before inspection.  Check for defects such as physical distortion, wear, cracks, and burrs.  If any defect is found, correct it before assembly. b. Sealing Surfaces.  Inspect all surfaces in contact with grease, packings, or seals for nicks and burrs.  If any defect is found, correct it before assembly. c. Bearings.    Inspect  bearings  for  rusting,  pitting,  rolling,  peening,  scoring,  burning,  brinnelling,  and  fatigue cracking. d. Gear  and  Splined  Shafts.    Inspect  gears  and  splined  shafts  for  wear,  pitting,  rolling,  peening,  scoring, burning, brinnelling, and fatigue cracking. e. Tubing and Hoses.  Inspect all hose surfaces for broken or frayed fabric.  Check for breaks caused by sharp kinks or contact with other parts of the forklift.  Inspect copper tubing lines for kinks.  Inspect fitting threads for damage. Replace any defective parts.  After assembly and during initial forklift operation period, check for leaks. f. Electrical  Parts.    Inspect  all  wiring  harnesses  for  broken,  chafed,  or  burned  wiring.    Inspect  all  terminal connectors for loose or broken parts. g. Metal Parts.    Visually  inspect  all  castings  and  weldments  for  cracks.    Parts  that  carry  a  great  load  should receive magnetic particle inspection.  Critical non-ferrous parts may be inspected with fluorescent penetrant. h. Drain Plugs.  When removing drain plugs from transmission, engine, hydraulic system components, or axle differential and planetary hubs, check amount of sediment on plugs.  Accumulations of grit or fine metal particles may indicate  actual  or  potential  component  failure.    A  few  fine  particles  are  normal.    This  inspection  helps  to  determine  if there are defective parts prior to internal inspection of the component and to predict degradation of the equipment. 2-25.  GENERAL REPAIR INSTRUCTIONS . a. Burrs.  Remove burrs from surface with a fine-cut file or crocus cloth. b. Exterior Parts. Chassis and exterior painted parts may be resurfaced when paint is damaged or where parts have been repaired. NOTE Polished  or  machined  steel  parts  not  protected  by  cadmium,  tin,  copper,  or  other  plating  or surface  treatments  require  protection.    Bare  metal  surfaces  must  be  free  of  moisture  when protective coating is applied. c. Protecting Parts.  Protect bare steel surfaces from rust when not actually undergoing repair work.  Dip parts in, or spray them with, corrosion preventive compound.  Aluminum parts may require protection in atmospheres having a high salt content. 2-492