R
Drive Screw
(Short turned end)
BALLNUT REMOVAL AND REPLACEMENT
PROCEDURE:
1. To begin, the screw assembly must be removed from the unit.
Follow the procedure for Drive Screw removal and replacement.
2. Remove the tape from the drive screw that is keeping the ballnut
in position, if installed.
3. Remove the coupling and adjacent components by removing the roll
pin using a 1/8"punch and hammer. Support the screw assembly
horizontally and the coupling on a solid surface, taking care not to
bend the drive screw end.
4. Thread the old ballnut along the screw towards the short turned end
until it is completely disengaged from the thread. Slide the old ballnut off
the end of the short shaft. Note: All the balls in the old ballnut will fall out.
Placing a catch bowl underneath the end will help containment.
5. Stand the drive screw vertically with the short turned end up.
6. To install the new ballnut remove the tie-wrap from the plastic arbor with a
side cutter. Be sure the arbor does not disengage from the ballnut or all
the balls in the ballnut will fall out.
7. Note the direction the ballnut must assemble to the drive screw. Slide the
arbor over the drive screw short turned end until it stops at the start of the
drive screw thread. Slide the ballnut off the arbor onto the screw and
engage the drive screw thread. Allow the ballnut to spin down the screw to
approximately halfway along its length. Band tape around the screw at
both ends of the ballnut to keep the ballnut in position.
8. Remove the plastic arbor from the short end.
9. Re-assemble the coupling and adjacent components onto the drive screw
short end in the order shown. Place the coupling horizontally on a solid
surface. Align the cross holes in the coupling and drive screw and insert
the roll pin. Use a hammer and 1/8"punch to install.
10. Return to the instruction for the installation of the Drive Screw, step 4.
PN 011580 Rev. F
Eng. 04/ 12/ 19
PowerMate
Operation Manual
5.04
Ballnut
Plastic Arbor
Tie Wrap
Coupling
Roll Pin
Drive Screw
Ballnut
Steel Thrust Washer
Steel Thrust Bearing
1/2"Plate Washer
Urethane Bumper
5/8 SAE Washer
Slide plastic arbor
firmly against here.
CAUTION: Once the tie wrap is
removed, do not allow
the ballnut to disengage
from the arbor until the
ballnut spins onto the
drive screw thread.
