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24
12.2 Mechanical and electrical problems
Table 5
Symptom Probable Cause Correction *
Machine will not
start/restart or
repeatedly trips circuit
breaker or blows
fuses.
No incoming power. Verify machine connections.
Cord damaged. Replace cord.
Band Saw frequently trips.
One cause of overloading trips which are
not electrical in nature is too heavy a cut.
The solution is to reduce feed pressure
into the blade. If this does not resolve the
issue, check for a loose electrical lead.
Building circuit breaker trips or fuse
blows.
Verify that band saw is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical lead.
Switch or motor failure (how to
distinguish).
If you have access to a voltmeter, you
can separate a switch failure from a
motor failure by first, verifying incoming
voltage at 115 +/-10% (or 230+/-10%)
and second, checking the voltage
between switch and motor at 115 +/-10%
(or 230+/-10%). If incoming voltage is
incorrect, you have a power supply
problem. If voltage between switch and
motor is incorrect, you have a switch
problem. If voltage between switch and
motor is correct, you have a motor
problem.
Motor overheated.
Clean motor of dust or debris to allow
proper air circulation. Allow motor to cool
down before restarting.
Motor failure.
Have a qualified electrician or motor
repair shop test the motor for function.
Miswiring of unit.
Double check to confirm all electrical
connections are correct. Refer to wiring
diagram to make needed corrections.
Switch failure.
If the start/stop switch is suspect, you
have two options: Have a qualified
electrician test the switch for function, or
purchase a new start/stop switch and
establish if that was the problem on
change-out.
Band Saw does not
attain full speed.
Extension cord too light or too long.
Replace with adequate size and length
cord.
Low current. Contact a qualified electrician.
Motor failure.
Have a qualified electrician or motor
repair shop test the motor for function.
* WARNING: Some corrections may require a qualified electrician.
13.0 Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call 1-800-
274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial Number of
your machine available when you call will allow us to serve you quickly and accurately.
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET.
Some parts are shown for reference only, and may not be available individually.
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