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8
Figure 4: Cut-out coil
removal and replace-
ment
Figure 3: Motor wiring diagram
5. Remove the connectors which secure the coil to the
switch mechanism.
6. Connect the new cut-out coil to the switch at the same
connectors as the removed coil.
7. Insert the new coil by pushing it to the back of its seat
and snapping it into position under its retainers.
8. Reinstall the switch cover to the switch base using the
two retainer screws.
9. Proceed to the next step -- changing the motor connec-
tions.
Changing motor connections
10. Again, be certain the power in the service branch to the
machine is disconnected and locked out.
11. Open the electrical connection cover plate on the motor.
12. A wiring diagram for the motor is included here and will
also be on a label underneath the motor plate cover.
13. Switch the connectors inside the motor to meet the
voltage requirements for the service branch supplying the
motor.
14. Close the motor plate cover and secure it shut with its
screws.
15. Reconnect power to the service branch and turn ON the
grinder to verify that it runs correctly, and that the disc turns
counterclockwise.
screws.
3. Locate the cut-out coil which is under the switch. See
Figure 4, below, for position and removal/installation motion.
4. The cut-out coil is a "snap fit" under the switch mecha-
nism, and is removed by pushing it to the rear of its mount
and snapping it out of its retainer.
Changing service voltage
As indicated in the previous section, the grinder is
shipped wired for the voltage specified onn the customer
order. If you decide to change the voltage in the service
branch to the grinder (from 220 to 440 volts, or 440 to
220 volts) the electrical connections inside the motor
changed to reflect the change in voltage, and the LVP
switch cut-out coil must also be changed to reflect the
new voltage requirement.
Replacing the LVP switch
cut-out coil
1. Be certain the power in the service branch to the
machine is disconnected and locked out.
2. Open the switch case by removing the two cover
Service wiring
1. Disconnect and lock out power to the service branch
you are going to use to power the grinder.
2. Connect the branch ground wire to the ground wire in
the cable. The ground wire in the cable will be either
green, or green with a white trace.
3. Connect the three power wires to the three power
wires in the cable.
4. Reestablish power to the service branch for the
grinder.
5. Turn on the grinder using the ON/OFF switch and
observe the direction of rotation of the drive disc. It
should be turning CLOCKWISE when viewed from the
front. If it is turning clockwise, the grinder is correctly
connected and can be placed in service. If the disc is not
turning clockwise, the electrical connections are hooked
up backward and need to be corrected.
To correct disc rotation
1. Disconnect and lock out power to the service branch
for the grinder.
2. Switch any two of the three power wires to the ma-
chine service cable.
3. Reestablish power in the service branch and turn the
grinder ON, again. The drive disc should now be rotating
in a clockwise direction and the machine can be re-
leased for service.
Install coil
under on/off
push buttons
and snap up
into position
Coil
Coil
retaining
tang
Exploded view of cutout coil positioning with arrows
to show insertion motion and callouts--
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