Trouble shooting--motor, Probable Cause

trouble shooting--motor

ALL MODELS

NOTE: Motors used on wood-workingtools 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

Excessive noise.

Motor tails to develop full power. NOTE:

LOW VOLTAGE: (Power

output of motor

PROBABLE CAUSE

1. Motor.

1.Circuit overloaded with

lights, appliances and other motors.

REMEDY

1.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 circuit when using the saw.

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.

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).

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.Feed work slower into blade_ .........

2.Install proper size fuses or circuit breakers. Check: that wiring will handle load.

3.Have switch replaced. Blow out sawdust.