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21
11.0 Troubleshooting
Motor & Electrical
Symptom
Possible Cause
Possible Solution
Machine does not start
or a breaker trips.
Power switch turned off/faulty.
Emergency Stop push-button is
engaged/faulty.
Plug/receptacle is at fault or wired
incorrectly.
Wall fuse/circuit breaker is
blown/tripped.
Motor is at fault.
Toggle Main Power switch to ON/replace.
Rotate clockwise slightly until it pops
out/replace it.
Test for good contacts; correct the wiring.
Ensure circuit size is suitable for this
machine; replace weak breaker.
Test/repair/replace.
Machine stalls or is
overloaded.
Wrong workpiece material.
Plug/receptacle is at fault.
Motor bearings are at fault.
Machine is undersized for the task.
Motor has overheated.
Motor is at fault.
Hydraulic fluid low in reservoir.
Hydraulic fluid pressure too low;
hydraulic pump at fault.
Hydraulic system has leaks or valves
at fault.
Use only metal that is within capacities of
machine.
Test for good contacts; correct the wiring.
Test by rotating shaft; rotational
grinding/loose shaft requires bearing
replacement.
Use sharp tooling; keep workpiece within
the capacities of machine; use cutting
lubricant.
Clean off motor, let cool, and reduce
workload.
Test/repair/replace.
Fill hydraulic reservoir.
Test/adjust for correct hydraulic fluid
pressure, replace pump if necessary.
Check/repair/replace hydraulic hoses,
connections, and valves.
Machine has vibration or
noisy operation.
Motor mount loose/broken.
Motor or component is loose.
Motor fan is rubbing on fan cover.
Motor bearings are at fault.
Tighten/replace.
Inspect/replace stripped or damaged
bolts/nuts and re-tighten with thread locking
fluid.
Tighten/Repair/Replace fan cover.
Test by rotating shaft; rotational
grinding/loose shaft requires bearing
replacement.
*Warning: Some corrections may require a qualified electrician.
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