Spring Clip
Ballnut
Cardboard Arbor
Plastic
Tape
over cross hole
on Screw Drive
Drive Screw
(Long 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 replacemen
t.
2. Remove the tape from the drive screw(19) that is keeping the ballnut in
position, if installed.
3. Apply one layer of thin plastic tape banding around the long turned end of
the screw over the cross hole. This is the end that
the bal
lnut will be
removed.
4. Stand the drive screw vertically with the long turned end up. Thread the
ballnut up the screw until it is completely disengaged from the thread.
The tape over the cross hole prevents the balls in the ballnut from falling
out into the cross hole.
5. Place a Cardboard Arbor firmly against the end of the screw, insuring that it
is
cen
tered and square, and slide the ballnut up onto the cardboard arbor.
Attach spr
ing clips to both ends of the arbor to retain the ballnut.
6. To install a ballnut, the reverse happens. Remove the spring clip from the
cardboard arbor on the square end of the ballnut. Be
sure the arbor does
not disengage th
e arbor or all the balls in the ballnut will fall out.
7. Place the end of the arbor firmly, centered an
d square, onto the long turned
end of the driv
e screw. Slide the ballnut off the arbor onto the screw, over
the tape 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 keed the ballnut in position.
8. Remove the plastic tape from the cross hole.
9. Return to the instruction fo
r the installation of the Drive Screw, step 4.
Bott
om Spring
Clip removed.
L SERIES SCREW
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