TM 10-3930-671-24 3. Loosen  spindle  (bearing  adjusting)  nut.    (If  nut completely removed, see below). 4. After spindle nut is loosened, hit the top of wheel (tire)   to   loosen   (unseat)   the   bearings.      This moves the bearings free of their seated, running position. 5. Tighten spindle (bearing adjusting) nut until there is  a  slight  binding  or   drag   in   the   bearings   as wheel   is   rotated   by   hand   in   both   directions. Then, back nut off to nearest slot in nut and lock with cotter pin.  Bend tabs on cotter pin. 6. Check  again  for  correct  bearing  adjustment  by rotating the wheel by hand.  Wheel should rotate freely     or     with     only     slight     "drag."     Readjust bearings by adjusting spindle nut, as necessary, to avoid binding in bearings. 7. Pack the area around spindle nut with grease. 8. Install hubcap by tapping into place with a rubber or plastic-faced hammer. Steer Wheel Bearing Lubrication (Clean, Repack & Adjust Bearings) Refer    also    to    wheel    bearing    adjustment    procedures noted previously. WARNING Be  sure  truck  is  parked  and  blocked up   correctly   and   safely   to   prevent injury    to    personnel    or    damage    to equipment. 1. Raise steer wheels off the floor. Refer to Section 3.3, Machine Jacking & Blocking. NOTE Because  of  the  heavy  weight  of  the wheel and tire, it is suggested to first remove  the  wheel  and  tire  assembly from hub when servicing the bearings    to    avoid    damage    to    the grease   seal   when   the   wheel   hub   is moved  off  or  on  the  spindle.    It  also makes the work simpler and easier. 2. Loosen wheel bolts or lug nuts before completely raising rear wheels off the floor. 3. Lower truck onto blocking.  Remove wheel bolts or  lug  nuts,  and  then  wheel  assembly  from  the hub. 4. Loosen and remove the hubcap from wheel hub. You   may   have   to   lightly   tap   hub   cap   with   a hammer and chisel and use a pry bar to loosen. Be careful not to damage mounting surfaces. 5. Clean    the    excess    grease    from    around    the spindle nut. 6. Remove  cotter  pin,  loosen  and  remove  spindle nut and bearing washer. 7. Pull   out   on   the   wheel   hub   slightly   to   loosen bearings, then remove outer bearing. 8. Pull  the  wheel  hub  off  the  spindle.    Support  the wheel  hub  to  avoid  dragging  the  grease  seal  at the back side across the thread on spindle end. 9. Clean the old grease out of center of wheel hub. F-422