Powermate L1 series - Ballnut Bracket Replacement (Cont)

Page 18 of 19
PowerMate
®
L1/L2 Series Model
Repair Manual
Section M: Ballnut Bracket Replacement (con’t)
PROCEDURE:
3. Turn the Outer Frame over to expose the Ballnut Bracket. (See Pic: M - D on pg 18) Remove the four nuts on the
Ballnut Bracket and separate from the Outer Frame.
4. Remove the Brake Assembly and Override Bearing Assembly. See section: Procedure for Repairing the L Series
Drive Screw Assembly - Brake Assembly Replacement and Override Assembly for detailed instruction.
5. Remove old Ballnut Bracket and replace.
6. Re-install the Brake Assembly and Override Bearing Assembly. See Brake Assembly Replacement and Override
Assembly replacement for detailed instruction.
7. Re-attach the Drive Screw Assembly to the Outer Frame with four nuts and bolts that were set aside in step 3.
8. Turn the stairclimber drive screw so the ballnut is positioned approximately halfway along the drive screw. Slide the
outer frame over the inner frame from the handle end. (See Pic M - E on pg 18)
9. Grip the drive screw and rotate to engage the coupling with the spline on the stairclimber motor. The bearing retainer
can now be fastened to the inner frame with ¼” bolts and nuts. (See Pic M - F on pg 18)
10. Re-assemble the toeplate to the outer frame with four ¼” carriage bolts and nuts.
11. Re-install the fuse and operate.
12. Adjust ballnut locknut properly. Tighten ballnut locknut hand tight only, then tighten the set screws. See Ballnut Lock
nut Adjustment for details.
13. Test the machine for smooth operation.
14. NOTE: Ballnut must spin in the ballnut bracket when machine is operated to its limit in either direction. Re-adjust the
ballnut locknut if necessary.
15. Test the machine for proper brake action. This test should be performed with a minimum load of 300lbs (140Kg).
Pic M - D: Remove the four nuts on
Ballnut Bracket
Pic M - E: Slide outer frame over the
inner frame.
Pic M - F: Fasten bearing retainer to
inner frame.