Trouble Shooting - Craftsman 113.221620 Owner's Manual

TROUBLE SHOOTING -- MOTOR
NOTE: Motors used on wood-working tools are
particulary susceptible to the accumulation of
sawdust and wood chips and should be blown out or
"vaccummed" frequently to prevent interferences
with normal motor ventilation.
NOTE: The starting relay is a GRAVITY SENSITIVE
TYPE. NEVER TURN THE POWER ON WHILE THE
SAW IS UPSIDE DOWN AS THIS WILL DAMAGE
THE MOTOR.
TROUBLE
Excessive noise.
Motor fails to develop
full power. (Power
output of motordecreases
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,
while a reduction of 20%
in voltage causes
reduction of 36% in
maximum power output.)
Motor starts slowly or
fails to come up to
full speed.
Motor overheats.
Starting relay in motor
will not operate (Motor
does not come up
to full speed.)
Motor stalls (resulting
in blown fuses or tripped
circuit breakers).
Frequent opening of
fuses or circuit breakers.
PROBABLE CAUSE
1. Motor
1. Circuit overloaded with
lights, appliances and
other motors.
2. 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 distribution
systems.)
4. Incorrect fuses or circuit
breakers in power line
1. Low voltage-will not trip
relay.
2. Starting relay not operating.
1. Motor overloaded.
2. Improper cooling. (Air
circulation restricted
through motor due to
sawdust, accumulating
inside of saw.
1. Burned relay contacts (due
to extended hold-in periods
caused by low line voltage.
etc.),
2. Saw not in upright position.
3. Loose or broken connections.
1. Starting relay not operating.
2. Voltage too tow 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 relay not operating
(motor does not reach
normal speed).
REMEDY
1. Have motor checked by qualified serwce
technician. Repair service is available at
your nearest Sears store.
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 Specification and Electrical
Requirements" section.
3. Request a voltage check from the power
company.
4. Install correct fuses or circuit breakers
1. Request a voltage check from the power
company.
2. Have relay replaced.
1.
2.
Do not cut so fast-Feed work slower into blade.
Clean out sawdust to provide normal air
circulation through motor.
See "Maintenance and Lubrication" section.
1. Have relay replaced and request a voltage check
from the power company.
2. Place saw in upright posihon.
3. Have wiring checked and repaired,
1. Have relay replaced.
2. Request a voltage check from the power
company.
3. Install proper size fuses or circuit breakers.
1. Don't cut so fast-Feed work slower into blade.
2. Install proper size fuses or circuit breakers.
3. Have relay replaced.
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