TM   5-2815-241-34&P FUEL  PUMP  -  CONTINUED ACTION LOCATION ITEM REMARKS 94. Tachometer drive shaft  (3) Tachometer   bushing (5)  and  tachometer gear (4) a. Lubricate  tachometer  drive  shaft  with extreme-pressure   grease. b. Install  tachometer  bushing  with  cham- fered  end  towards  tachometer  gear. c. Position  tachometer  gear  on  tachometer shaft and, using arbor press and man- drel,  press  tachometer  gear  onto  tacho- meter  shaft  until  flush  with  end  of tachometer   shaft. d. Check to see that tachometer gear and shaft  turn  freely  in  tachometer  bushing. e. Using thickness gage, measure clear- ance  between  tachometer  bushing  and tachometer  gear.  Maximum  clearance  is 0.005  inch  (0.127  mm). NOTE Make sure all parts and subassemblies are clean and free of dust and dirt before pro- ceeding  with  assembly  procedures. TA   242549 2-317