TM 10-3930-653-14&P 2. Check the drive and driven  gear teeth for damage. If (damaged, replace  the drive and driven gears  as  a set.      Moreover,   measure   the   outside   diameter   of shaft,    and    if    less    than    18.935mri    (0.746    inch), replace the, .shaft 3. Measure the overall length of bushings. If not correct replace  the  bushing  and  gear  at  the  same  time  if necessary.        In    addition,    if    the    shaft-to-bushing clearance    is    found    to    be    more    than    0.177mm (0.006968  inch), replace the bushing and gear. • In  the  case  where  the  drive  gear      or    driven gear   is necessary  to  be  replaced, replace them as a set only. • The clearance between the bushing  and gear at      the   shaft      should   be      within   0.005mm (0.000197 inch). If either the bushing or gear is defective, replace them' as a set only. REASSEMBLY Before  reassembling,  make sure that all disassembled parts are clean. 1. If  the  oil  seal  was  removed  from  the  pump  body, proceed as follows: a. Make sure  there is no foreign matter  or flaw on the oil seal fitting part of the pump body. b. Using a press, install a new oil seal with the lip inward. 2. Apply a good quality  mineral grease on new 0-rings and install these O-ring on the two bushings marked "C"    on    the    end    face.    Then,  install  the  two bushings in the pump body at the same time with the O-ring side toward the outside of the pump. 3.    Wrap vinyl tape around the spline portion of the drive gear and install in the pump body. Now,  install    the driven  gear.  When  the  gears  are  reused,  reinstall them,   aligning  the  matchmarks made during the disassembly. 4-203