6.2 MOTOR BRUSH REPLACEMENT (SEE FIG. C)
1. Unplug unit from the power source.
2. Remove the screws which secure the cover to the con-
trol housing and remove cover.
3. Locate and remove the red and black motor leads.
4. Loosen the four screws which secure the motor to the
control housing. Do not remove screws.
5. Remove the drive belts from the motor drive gears.
6. Using a 3/32" Allen wrench, loosen the set screws secur-
ing the drive gears to the motor shaft (two per gear) and
remove gears.
7. Remove the four screws which were loosened in Step
four.
8. Carefully remove the motor from the unit.
9. Locate the motor brush retaining screws and remove by
turning counter-clockwise. Turn slowly, being careful
not to lose the spring located behind the retaining screw.
10. Remove and inspect motor brush and replace if length is
less than 6mm.
11. For reassembly, reverse above procedure.
6.3 SPEED CONTROL BOARD REPLACEMENT (SEE
FIG. A)
1. Unplug the unit from the power source.
2. Remove the screws which secure the cover to the con-
trol panel, and remove cover.
3. The control board is mounted to the front bottom of the
control housing. Unplug the control board from the
wiring harness.
4. Remove the two screws which secure the control board
to the standoffs.
5. Remove the locking nuts from the speed control poten-
tiometer.
6. Remove the hex nut that secures the potentiometer to the
face of the control unit.
7. Remove the defective control board from the unit.
8. For reassembly, reverse above procedure using the new
control board.
6.4 FUSE REPLACEMENT (SEE FIG. H)
1. Disconnect the cordset from the AC power source.
2. Locate power input connector/voltage selector module.
3. Remove the fuse drawer using a small flat screwdriver
to lift the tab.
4. Replace with new fuse:
115VAC unit: 1 1/4 X 1/4" 3AG, 250V, O.750AT fuse
Be sure the voltage selector window in the drawer
shows 115V and the correct cord set is used.
Model 4862 Cell Roller___________________________________________________________________Troubleshooting
6 - 2
