Craftsman 113.239420 Owner's Manual page 21

TROUBLE SHOOTING -- MOTOR
NOTE: Motors used on wood-working tools are particularly susceptib{e 1othe accumulation
of sawdust and wood chtps 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 reduction
of 20% in voltage causes
a reduction of 36% in
maximum power output.)
Motor starts slowly
or falls to come up
to full speed.
Motor overheats,
Starting switch in
motor wilt not
operate.
n ii
Motor stalls
(resulting in btown
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.
1. Low voltage.
2. Windings burned out or
open.
3. Starting switch not
operating.
.................. , ill
1 Motor overloaded.
2 Improper cooling. (Air
circulation restricted
through motor due to
sawdust, accumulating
inside of saw).
l l/i i i ll,_L ,
1. Burned switch contacts
(due to extended
ho]d-in periods caused
by low line voltage, etc.)
2. Shorted capacitor
3, Loose or broken
connections.
ii ii ii
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.
L'"" _"'"_ "" ' ' ' "' _' ""
1. Motor overloaded.
2. Fuses or circuit breakers
do not have sufficient
capacity.
3. Starting switch not
operating (motor does
not reach speed).
1.
1.
3,
m|
1,
2
REMEDY
Have motor checked by qualified service
technician, Repair service is available at
your nearest Sears store.
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.
.i i . i _Jl_L.iw
1. Request voltage check from the power
company. Check size of circuit wiring,
2. Have motor repaired or replaced,
Have switch _eplaced.
ii i, i iii,,,,, ,, ,,,, ,H,,II i i
Feed work stower into blade.
Clean out sawdust to provide normal air
circulation through motor,
See "Maintenance and Lubrication" section.
i
1 Have switch repJaced and request a voltage check
from the power company.
2. Have capacitor tested and replace if detective.
3, .Have wiring checked and repaired,
ill.ll.,,, .,m i i i i
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 fuse# or circuit breakers,
3 Have switch replaced.
21