Install the new ballscrew: Put one end of the ballscrew through the ballscrew bearing. Put the other end through the support-side bearing assembly.
Attach the ballscrew nut to the ballscrew bearing with the (4) bolts. Leave the bolts loose for alignment.
Loosen the support-side bearing bolts . Install the bearing locknut finger-tight, then loosen it one turn.
Install the motor-side bearing housing  and leave the (4) bolts  loose enough for the bearing housing  to be aligned later.
Install the motor-end bearing locknut . Tighten the locknut  by hand until the ballscrew turns as you tighten the locknut, then loosen the locknut 1/4 turn.
Torque the locknut screw  to 4 in-lbs.
Tighten the ballscrew nut on the support-side of the ballscrew in this sequence:
- Tighten the nut by hand until the ballscrew turns as you tighten the nut. Then loosen the nut 1/4 turn.
- Torque the lock screw to 4 in-lb.
- Install motor with the coupling.
Tighten the locknut screw . Torque the motor bolts  to 30 ft-lb.