TM    10-3930-638-24&P 3-24. STEERING SYSTEM MAINTENANCE (cont) b.  Steering  Gear  (cont). STEP LOCATION I T E M ACTION REMARKS INSPECTION   (cont) 28 Rotor  set  (11) Inspect 29 REPAIR 30 Rotor  set  (11) Check clearance NOTE Inspect lobes and faces of rotor and stator for scratches, burrs and scoring. Inspect splines  in  rotor  for  chipping,  damage  or excessive wear. Use micrometer to meas- ure thickness (face-to-face) of rotor and stator. Replace rotor set (11) if lobes, faces or splines damaged, or if thickness difference between rotor and stator is more than 0.002 inch Place rotor set face down on the lapped face of the end cover (3). Use a tapered feeler gage to measure clearance between rotor and stator at each lobe. Replace rotor set if clearance is more than 0.007 inch If abrasive paper is new, it should be rubbed down with a piece of steel to remove sharp grit which would produce scratches. WARNING Dry cleaning solvent (P-D-680), used to clean parts is toxic and flammable.  Wear  protective  goggles  and  gloves  and  use  only  in  a well ventilated area. Avoid contact with skin, eyes, and clothes and don’t breathe vapors. Do not use near open flame or exces- sive heat and don’t smoke when using it. Failure to do so could cause serious injury. If you become dizzy while using cleaning solvent, get fresh air immediately, and get medical attention. If contact with skin or clothes is made, flush with large amounts of water. If contact with eyes is made, wash eyes with water immedi- ately,  and  obtain  medical  aid  immediately. WARNING Wear safety glasses when drying parts with compressed air. Fail- ure to do so could cause serious injury to eyes and possible blind- ness. If you hurt your eyes or if a foreign object is blown into your eyes, seek medical attention immediately. 3-170