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Model W1839 & W1840 (For Machines Mfd. Since 3/16)
The following troubleshooting tables cover common problems that may occur with this machine. If you
need replacement parts or additional troubleshooting help, contact our Technical Support.
Note: Before contacting Tech Support, find the machine serial number and manufacture date, and if
available, your original purchase receipt. This information is required to properly assist you.
Motor.and.Electrical
PROBLEM
Machine does not
1. Switch disabling key removed.
start or a breaker
2. Incorrect power supply voltage or circuit size.
trips.
3. Power supply circuit breaker tripped or fuse
blown.
4. Motor wires connected incorrectly.
5. Potentiometer/variable-speed dial controller
at fault.
6. Circuit board at fault.
7. Motor at fault.
Machine stalls or
1. Machine undersized for task.
is underpowered.
2. Motor wired incorrectly.
3. Motor overheated.
4. Run capacitor at fault.
5. Motor bearings at fault
Machine
has
1. Machine incorrectly mounted to workbench or
vibration
or
floor.
noisy
opera-
2. Motor or component loose.
tion.
3. Grinding wheel at fault/arbor hole not round.
4. Motor bearings at fault.
5. Motor shaft bent.
SERVICE
Troubleshooting
POSSIBLE.CAUSE
.
-27-
CORRECTIVE.ACTION
1. Install switch disabling key.
2. Ensure correct power supply voltage and circuit
size.
3. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
4. Correct motor wiring connections.
5. Test/replace.
6. Inspect/replace.
7. Test/repair/replace.
1. Use new grinding wheel; reduce feed rate/pres-
sure.
2. Wire motor correctly.
3. Clean motor, let cool, and reduce workload.
4. Test/repair/replace.
5. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
1. Adjust feet, shim, or tighten mounting hardware.
2. Inspect/replace damaged bolts/nuts, and re-tight-
en with thread-locking fluid.
3. Dress/replace grinding wheel (Page 23).
4. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
5. Test with dial indicator and replace motor.
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