TM 10-3930-653-14&P (6) OVER-RUNNING CLUTCH ASSEMBLY Inspect  pinion  assembly  and  screw  sleeve.    Screw sleeve must slide freely along armature shaft splines.  If damage is found or resistance is felt when sliding, it must be repaired.  Inspect pinion teeth.  If excessive rubbing is found on teeth, it should be replaced.  Flywheel ring gear also must be inspected. Fig. 4-166.  Over-Run Clutch Assembly (7) BRUSH HOLDER TEST FOR GROUND Using   a   circuit   tester,   place   one   test   probe   onto negative   side   brush   holder   and   another   onto   positive side.    If  tester  shows  continuity,  brush  holder  is  shorted to ground.  Replace an insulator or brush holder. Fig. 4-167.  Testing Brush for Ground (8) PINION CASE BEARING METAL Inspect   bearing   metal   for   wear   or   side   play.      If clearance  between  bearing  metal  and  armature  shaft  is more than 0.2 mm (0.008 in), replace metal.  Press in a new  bearing  and  adjust  clearance  to  0.03  to  0.10  mm (0.0012 to 0.0039 in).  Bearing metal should be pressed in so that end of bearing metal is flush with gear case. (9) MAGNETIC SWITCH ASSEMBLY (1) Using  a circuit tester, check continuity between "S" terminal of magnetic switch and switch body metal. It  continuity  does  not  exist,  shunt  coil  is  opened. Replace switch assembly. (2) In   the   same   manner   as   above,   check   continuity between  terminals  "S"  and  "M".    If  continuity  does  not exist, series coil is opened.  Replace switch assembly. 4-7-3-6.   ASSEMBLY Reassembly starting motor in the reverse sequence of disassembly. When   assembly,   be   sure   to   apply   grease   to   the gear case and rear cover bearing metal, and apply oil to pinion slightly. 4-7-3-7.   TEST (1) PERFORMANCE TEST Starting  motor  should  be  subjected  to  a  "no-load" test  whenever  it  has  been  overhauled  to  ensure  that  its performance will be satisfactory 4-99