Override Bearing Assembly; Drive Screw Removal And Installation - Powermate Aluminum LE Series Operating Manual

OVERRIDE BEARING ASSEMBLY

1. Remove the brake assembly as outlined in the Brake Assembly Procedure.
Continue the disassembly by removing the bearing retainer (12), two steel thrust
2.
washers (11), steel thrust bearing (9), two plate washer (13), and the urethane
bumper (14).
NOTE: At this point, if it is intended to replace the ballnut or removing the Drive Screw
for service/replacement, complete those procedures first before continuing with the
override bearing replacement.
3. As per the screw assembly drawing, replace the override bearing components
(Bearing Override Kit P/N 400160) in reverse order as follows:
Apply a few drops of light machine oil to thrust bearing (9) and the roller bearing in
the bearing retainer (12).
Replace brake assembly components as per the Brake Assembly instruction Step 4.
4.

DRIVE SCREW REMOVAL AND INSTALLATION

1. Remove the brake assembly as outlined in the Brake Assembly procedure.
2. Remove the override bearing assembly as outlined in the Override Bearing
Assembly procedure.
3. Apply a band of tape around the drive screw (20) at each end of the ballnut
(19). This will prevent the ballnut from disengaging the drive screw until the
appropriate time. The set screws (16) in the ballnut locknut (15) may be
loosened and the locknut removed. Pass the screw out through the ballnut
bracket (17) and remove the spring disc washer (18) from the screw.
NOTE:At this point, if it is intended to remove the Ballnut (19) for replacement, complete
the Ballnut Replacement procedure first, before reinstalling the drive screw.
4. To reinstall the drive screw (20), place the spring disc washer (18) over the
ballnut thread, insuring the concave side of the washer is oriented away
from the square body of the ballnut. Insert the drive screw (20) through the
ballnut bracket (17) as per the assembly drawing. Thread the ballnut locknut
(15) onto the ballnut (19) but do not tighten. Remove the tape either side of
the ballnut, if applied.
Continue the screw re-assembly process by returning to step 3 of the
5.
Override Bearing Procedure.
Item # 13-14-13-11-9-11-12
PowerMate
5.04
®
Operation Manual
PN 013560 Rev.D2
Eng. 12/ 12/ 12