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trouble shooting--motor
ALL MODELS
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 and proper
operation of the centrifugally-operated starting switch.
TROUBLE PROBABLE CAUSE REMEDY
Excessive noise. 1. Motor. 1. Have motor checked by qualified service
technician. Repair service is available at your
nearest Sears store.
1.
Motor tails 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 reduction
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.
Circuit overloaded with
lights, appliances and
other motors.
Undersize wires or circuit
too long.
General overloading of
power company
facilities.
1. Low voltage.
2. Windings burned out
or open.
3. Starting switch not
operating.
1. Motor overloaded.
2. Improper cooling (Air
circulation restricted
through motor due to
sawdust accumulation_
1. Burned switch contacts
(due to extended hold-in
periods caused by low line
voltage_ etc.)
2. Shorted capacitor.
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 have sufficient
capacity.
3. Starting switch not
operating (motor does not
reach speed).
1. Do not use other appliances or motors on
same circuit 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.
1. Request voltage check from the power
company_ Check size of circuit wiring.
2. Have motor repaired or replaced.
3. Blow out sawdust from motor. Have motor
repaired.
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.
2.
Feed work slower into blade_ .........
Install proper size fuses or circuit breakers.
Check: that wiring will handle load.
3. Have switch replaced. Blow out sawdust.
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