Section 7: Service; Troubleshooting - Grizzly G0759 Manual

Troubleshooting

SECTION 7: SERVICE

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.
Symptom Possible Cause
Machine does not 1. Fuse on machine blown.
start. 2. Plug at fault or wired incorrectly.
3. Motor wired incorrectly.
4. Wall fuse/circuit breaker is blown/tripped.
5. Wiring is open/has high resistance.
6. Machine power switch is at fault.
7. Motor is at fault.
Machine stalls or is 1. Feed rate/cutting speed too fast.
overloaded. 2. Wrong cutter type.
3. Machine is undersized for the task or tooling
is incorrect for the task.
4. Motor connection is wired incorrectly.
5. Motor bearings are at fault.
6. Motor has overheated.
7. Motor is at fault.
Machine has 1. Motor or machine component is loose.
vibration or noisy
operation. 2. Excessive depth of cut.
3. Cutter/tooling is loose.
4. Cutter is dull or at fault.
5. Bit is chattering.
6. Machine is incorrectly mounted or sits
unevenly.
7. Motor bearings are at fault.
Model G0704 (Mfd. Since 05/16)
Troubleshooting
Possible Solution
1. Replace blown fuse.
2. Ensure plug is not damaged and is wired correctly.
3. Ensure motor wiring is correct.
4. Ensure circuit size is correct and a short does not
exist. Reset breaker or replace fuse.
5. Check for broken wires or disconnected/corroded
connections; repair/replace as necessary.
6. Ensure switch is wired correctly; replace if at fault.
7. Test/repair/replace.
1. Decrease feed rate/cutting speed.
2. Use the correct cutter for the task.
3. Use smaller or sharper tooling; reduce feed rate or
spindle speed; use cutting fluid if possible.
4. Wire motor correctly for the intended voltage.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Clean off motor, let cool, and reduce workload.
7. Test/repair/replace motor.
1. Inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. Decrease depth of cut.
3. Make sure tooling is properly secured.
4. Replace/resharpen cutter.
5. Replace/sharpen bit; index bit to workpiece; use
appropriate feed rate and cutting RPM.
6. Tighten/replace mounting bolts in bench; relocate/
shim machine.
7. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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