SYMPTOM
POSSIBLE
CAUSE(S)
Motor will not start
1. Low voltage
2. Open circuit in motor or
loose connections
3. Defective switch
4. Defective capacitor
Motor will not start;
1. Short circuit in line cord or plug
fuses blown or circuit breakers
are tripped
2. Short circuit in motor or loose
connections
3. Incorrect fuses or circuit breakers
in power line
Motor fails to develop full power 1. Power line overloaded with lights,
(power output of motor
appliances and other motors
decreases rapidly with
2. Undersize wires or circuits too long
decrease in voltage at motor
terminals)
3. General overloading of power
company's facilities
Motor overheats
1. Motor overloaded
2. Defective belt
Motor stalls
1. Short circuit in motor or loose
(resulting in blown fuses or
connections
tripped circuit breakers)
2. Low voltage
3. Incorrect fuses or circuit breakers
in power line
4. Motor overloaded
5. Defective belt
Machine slows down
Applying too much pressure to
while operating
workpiece
Abrasive belt runs off top wheel 1. Not tracking properly
2. Defective belt
3. Belt housing not set properly
CORRECTIVE
ACTION
1. Check power line for proper voltage
2. Inspect all lead connections on motor
for loose or open connection
3. Replace switch
4. Replace capacitor
1. Inspect line cord or plug for damaged
insulation and shorted wires
2. Inspect all lead connections on motor for
loose or shorted terminals or worn
insulation on wires
3. Install correct fuses or circuit breakers
1. Reduce the load on the power line
2. Increase wire sizes, or reduce length of
wiring
3. Request a voltage check from the power
company
1. Reduce load on motor
2. Replace belt
1. Inspect connections in motor for loose or
shorted terminals or worn insulation on
lead wires
2. Correct the low line voltage conditions
3. Install correct fuses or circuit breakers
4. Reduce load on motor
5. Replace belt
Ease up on pressure
1. See operation section
"Tracking Abrasive Belt"
2. Replace belt
3. Adjust housing lock bolt, see Operation
section, "Horizontal Belt Sanding"
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