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G0459 12" Drum Sander
-23-
SECTION 7: SERVICE
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips.
1. Plug or receptacle is at fault or wired incor
-
rectly.
2. Start capacitor is faulty.
3. Motor connection is wired incorrectly.
4. Power supply is faulty, or is switched OFF.
5. Centrifugal Switch is at fault.
6. Motor ON button or ON/OFF switch is faulty.
7. Motor is at fault.
1. Test power plug and receptacle for good contact and
correct wiring.
2. Test and replace capacitor as required (see photo,
Page 39).
3. Correct motor wiring (see
Page 40).
4. Make sure all hot lines and grounds are operational
and have correct voltage on all legs.
5. Adjust or replace the centrifugal switch.
6. Replace faulty ON button or ON/OFF switch (see
photo, Page 39).
7. Test, repair or replace motor.
Machine has
vibration or noisy
operation.
1. Motor or component is loose.
2. Motor fan is rubbing on fan cover.
3. V-belt(s) is worn or is loose.
4. Pulley is loose.
5. Motor bearings are at fault.
6. Centrifugal switch.
1. Inspect, replace for stripped or damaged bolts/nuts,
and re-tighten with thread locking fluid.
2. Replace dented fan cover, and replace loose or dam
-
aged fan.
3. Inspect belt(s), replace as matched sets, and re-ten
-
sion.
4. Remove pulley, replace shaft, pulley, setscrew, and
key as required, and realign.
5. Check bearings, replace motor or bearings as
required.
6. Normal snap/click sound on RPM wind down. No
problem exists.
Motor overheats. 1. Motor overloaded.
2. Air circulation through the motor restricted.
1. Reduce load on motor.
2. Clean off motor to provide normal air circulation.
Troubleshooting
Motor & Electrical
This section is provided for your convenience—it is not a substitute for the Grizzly Service Department. If
you need help troubleshooting, you need replacement parts, or you are unsure of how to perform the pro
-
cedures in this section, then feel free to call our Technical Support at (570) 546-9663.