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Motor
NOTE: Motors used on wood working tools are particularly susceptible to the accumulation of sawdust and WOod chips
and should be blown out or "Vacuumed" frequently to prevent interference with normal motor ventilation.
Trouble
Excessive Noise
Motor fails to develop
full power. NOTE: Low
Voltage:
(Power output of motor
decreases rapidly with
decrease in voltage at
motor terminals. For
example, a reduction of
10% in voltage causes
a reduction of 19% in
maximum power output
of which the motor is
capable, and a reduc-
tion of 20% in voltage
causes a reduction of
36% in maximum power
output.)
Motor starts slowly or
fails to come up to full
speed
Motor overheats
Starting switch in
motor will not operate
Motor stalls (resulting in
blown fuses or tripped
circuit breakers)
Frequent opening of
fuses or circuit breakers
Probable Cause
1. Motor
Circuit overloaded with lights,
appliances and other motors.
Undersize wires or circuit too
long.
3. General overloading of power
company facilities. (In some
sections of the country,
demand for electrical power
may exceed the capacity of
existing generating and distribu-
tion systems.)
4. Incorrect fuses of circuit break-
ers in power line.
1. Low voltage.
2. Windings burned out or open.
3. Starting switch not operating
.
2.
Motor overloaded
Improper cooling. (Air circulation
restricted through motor due to
sawdust, accumulating inside
of saw.)
1. Burned switch contacts (due to
extended hold-in periods
caused by low line voltage, etc.)
2. Shorted capacitor (when
equipped)
3. Loose or broken connections.
1. Starting switch not operating.
2. Voltage too low to permit motor
to reach operating speed.
3. fuses or circuit breakers do not
have sufficient capacity.
1. Motor overloaded
2. Fuses or circuit breakers do not
I have sufficient capacity.
3. Starting switch not operating
(motor does not reach speed.)
Remedy
.
Have motor checked by qualified service technician.
Repair service is available at your nearest Sears
store.
1. Do not use other appliances or motors on same ciro
cult when using the saw.
2. Increase wire sizes, or reduce length of wiring. See
"Motor Specifications and electrical Requirements"
section.
3. Request a voltage check from the power company.
4. Install correct fuses or circuit breakers.
1. Request voltage check from the power company.
2. Have motor repaired or replaced.
3. Have switch replaced.
1. Feed work slower into blade.
2. Clean out sawdust to provide normal air circulation
through motor. See "Maintenance" and "Lubrication"
section.
1. Have switch replaced and request a voltage check
from the power company.
2. Have capacitor tested and replace if defective,
3. Have wiring checked and repaired.
1. Have switch replaced.
2. Request voltage check from the power company.
3. Install proper size fuses or circuit breakers.
1. Feed work slower into blade.
2. Install proper size fuses or circuit breakers.
3. Have switch replaced.
I
49
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