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TROUBLE SHOOTING -- MOTOR
NOTE Motors used on wood-working tools are particular y susceptib!e 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.
motor will not
operate.
2.
3
Motor stalls 1
(resulting in blown
fuses or tripped 2.
eircuLt breakers}.
[ Frequent opening of
fuses or circuit
breakers.
I
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 : 3. General overloading of
10% in voltage causes power comoanv
a reduction of 19% in ' facilities - "
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.)
i
J
Motor starts slowly I 1. Low voltage will not
or fails to come up I trip relay
to full speed. 2. Windings burned out
or open.
3. Starting relay not
operating.
1. Motor overloaded
2. Improper cooling. (Air
c_rculation restricted
' through motor due to
i sawdust accumulating.
1 Burned switch contacts
Starting switch in (due to extended
hold-in periods caused
by low line voltage, etc)
Shorted capacitor
Loose or broken
connections.
Starting switch not
operating
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)
REMEDY
1. Have motor checked by qualified service
technician. Repair service is available at
, your nearest Sears store,
1. Circuit overloaded with '
1. Do not use other appliances or motors on
lights, appliances and same circuit when using the saw.
other motors.
2. Undersize wires or circuit 2. Increase wire sizes, or reduce length of wiring.
too long. See "Motor Specifications and Electrical
Requirements" section,
3. Request a voltage check from the power
company.
1. Request voltage check from the power company.
2. Have motor repaired or replaced
3. Have relay replaced.
1. Feed work slower into belt or disc.
•2. Clean out sawdust to provide normal air
c_rculation through motor
See "Maintenance and Lubrication" section
1. Have switch replacedand request a voltage check
from the power company.
2 Have capac=tor tested and replace _f defectwe
3 Have wiring checked and repaired.
I Have switch replaced.
2 Request voltage check from the power company
3. install proper s=ze fuses or c=rcult breakers.
1. Feed work slower into belt or disc.
2 Install proper s_ze fuses or c_rcu_t breakers
3, Have sw_tch replaced.
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