Repairing a Preloaded Ballnut

 
Start with a clean tray and surface on which to work.
 
Install all the components onto the ballscrew.

See the diagram at the bottom of the page for positioning of parts.
 
Set the entire ballnut together and tighten the preload collar all the way to the back nut.

Make sure the ball return holes point in the same direction.
 
Wiggle the ballnut around until a channel is formed at the recirculation tube.  Use a magnetic point (a magnetized nail will work) to drop the balls one at a time.

  Make sure none of the balls try to go the wrong direction and fall out of the back of the nut.

 
 
Pack the ballnut return tube with Vaseline.
 
Put both halves together and put the tube back on the nut.  Replace the holding strap and the screws.
 
One side complete.  When beginning the second nut make sure the nuts are as close together as possible.
 
All Done.
 
For a more complete description of repairing a ballnut please see Repairing a Single Circuit Ballnut