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Model G0746/G0749 (Mfg. Since 3/13)
-75-
Review the troubleshooting and procedures in this section if a problem develops with your machine. If you
need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663.
Note: Please gather the serial number and manufacture date of your machine before calling.
SECTION 7: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does not
start or a circuit
breaker trips.
1. EMERGENCY STOP button depressed/at
fault.
2. Main power switch OFF or at faul.
3. Incorrect power supply voltage or circuit
size.
4. Power supply circuit breaker tripped or fuse
blown.
5. Motor wires connected incorrectly.
6. Thermal overload relay has tripped.
7. Contactor not energized/has poor contacts.
8. Wiring is open/has high resistance.
9. Motor is at fault.
1. Rotate button head to reset. Replace if at fault.
2. Turn main power switch ON or replace if at fault.
3. Ensure correct power supply voltage and circuit
size.
4. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
5. Correct motor wiring connections. (Page 87).
6. Reset; adjust trip load dial if necessary; replace.
7. Test all legs for power/replace if at fault.
8. Check/fix broken, disconnected, or corroded wires.
9. Test/repair/replace.
Motor stalls or is
underpowered.
1. Gearbox at fault.
2. Belt(s) slipping.
3. Motor wired incorrectly.
4. Motor bearings at fault.
5. Motor overheated.
6. Contactor not energized/has poor contacts.
7. Motor overheated. Contactor not energized/
has poor contacts.
8. Motor at fault.
1. Select appropriate gear ratio; replace broken or
slipping gears.
2. Tension/replace belt(s); ensure pulleys are aligned.
3. Wire motor correctly.
4. Test/repair/replace.
5. Clean motor, let cool, and reduce workload.
6. Test all legs for power/replace if at fault.
7. Clean motor, let cool, and reduce workload. Test all
legs for power/replace if at fault.
8. Test/repair/replace.
Loud, repetitious
noise coming from
lathe at or near the
motor.
1. Pulley set screws or keys are missing or
loose.
2. Motor fan is hitting the cover.
1. Inspect keys and set screws. Replace or tighten if
necessary.
2. Tighten fan, shim cover, or replace items.
Motor overheats. 1. Motor overloaded. 1. Allow motor to cool; reduce load on motor.
Motor is loud when
cutting, or bogs
down under load.
1. Excessive depth of cut or feed rate.
2. Spindle speed or feed rate wrong for
cutting operation.
3. Cutting tool is dull.
1. Decrease depth of cut or feed rate.
2. Refer to the feeds and speed charts in Machinery's
Handbook or a speeds and feeds calculator on the
internet.
3. Sharpen or replace the cutting tool.