TM 10-3930-671-24 F. Examine   the   pulley   for   wear   or   fracture   and inspect key-way for wear.  Check the fan for bent or    missing    fins    and    possible    wear    of    the mounting  hole  from  running  loose.    Reuse  if  in good-condition (Figure No.  49). FIGURE NO.  49. FRONT  BEARING  REMOVAL  -  Use  bearing  puller  to pull bearing off shaft, if the bearing is to be reused, puller must contact inner race only (Figure No.  50). FIGURE NO.  50. REAR BEARING REMOVAL The rear bearing is a press fit to the rear rotor shaft.  Any commercial bearing puller may  be  used  to  remove  the  rear  bearing  from  the  shaft (Figure No.  51).  Pull on the inner race if bearing is to be reused. FIGURE NO.  51. When  replacing  alternator  bearings,  it  is  essential  that the replacement bearing be equal to original equipment. The TA bearings have special clearance between  races and     bearings,     plus     they     are     lubricated     with     high temperature BRB No.  2 or Andok 260 grease.  Refer to Parts List for recommended bearings. ASSEMBLY  OF  FRONT  HOUSING  -  Make  certain  that bearing cavity in front housing is clean and felt dust seal is installed in recess.  Press bearing into housing, using driver tool that exerts pressure on outer race only. Apply  only  sufficient  pressure  to  seat  bearing,  against bottom of cavity (Figure No. 52).  Install bearing retainer, secure with the attaching screws. FIGURE NO.  52. F-293