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11
10.0 Troubleshooting JB-10P, JB-10R
Symptom Possible Cause Correction *
Motor will not start Safety key removed from switch. Insert safety key to start machine.
Low voltage. Check power line for proper voltage.
Open circuit in motor or loose
connection.
Inspect all lead connections on motor for
loose or open connections.
Motor will not start: fuses
or circuit breakers blow.
Short circuit in line cord or plug. Inspect cord or plug for damaged insulation
and shorted wires.
Short circuit in motor or loose
connections.
Inspect all connections on motor for loose or
shorted terminals or worn insulation.
Incorrect fuses or circuit breakers in
power line.
Install correct fuses or circuit breakers.
Motor overheats,
overload protection
activated.
Motor overloaded. Allow machine to cool, then restart. Reduce
feed speed.
Air circulation through motor restricted. Clean motor fan with compressed air to
restore normal air circulation.
Motor stalls, resulting in
blown fuses or tripped
circuit.
Motor overloaded. Reduce load on motor.
Short circuit in motor or loose
connections.
Inspect connections on motor for loose or
shorted terminals or worn insulation.
Low voltage. Correct the low voltage conditions.
Incorrect fuses or circuit breakers in
power line.
Install correct fuses or circuit breakers.
Motor slows when
operating.
Applying too much pressure to
workpiece.
Feed workpiece more slowly.
Cutterhead rotation too slow for
workpiece.
Increase rotation speed.
Too deep of a cut. Reduce cutting depth. Make multiple passes
if needed.
Blade inserts are dull. Rotate or replace inserts.
Machine slides along
workpiece with difficulty.
Excess friction. Raise steel balls on guide plates to provide
smoother travel.
Loud, repetitive noise
coming from machine.
Motor fan is hitting fan cover. Tighten fan or shim cover.
Bearing failure or motor malfunction. Have machine elements inspected, replace
parts as needed (qualified personnel only).
Table 3
* WARNING: Some corrections may require a qualified electrician.
11.0 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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