Section 7: Service; Troubleshooting - Grizzly G1071 Owner's Manual

SECTION 7: SERVICE

review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. if you need replacement parts or you are unsure of your repair skills, then feel free to call our technical
support at (570) 546-9663.
Motor & Electrical
Symptom Possible Cause
machine does not 1. switch disabling key removed.
start or a breaker
2. power supply switched off or at fault.
trips.
3. plug/receptacle at fault/wired wrong.
4. start capacitor at fault.
5. motor connection wired wrong.
6. Wall circuit breaker tripped.
7. Wiring open/has high resistance.
8. motor on/off switch at fault.
9. motor at fault.
machine stalls or is 1. feed rate too aggressive.
underpowered.
2. Workpiece
machine.
3. motor wired incorrectly.
4. plug/receptacle at fault.
5. motor bearings at fault.
6. machine undersized for task.
7. motor overheated.
8. motor at fault.
Motor Overheats 1. Motor overloaded.
2. Air circulation through the motor restricted.
machine has 1. motor or component loose.
vibration or noisy
operation.
2. motor fan rubbing on fan cover.
3. motor bearings at fault.
4. gearbox is damaged.
model g1071 (mfg. 1/02+)

Troubleshooting

material not suitable for
Possible Solution
1. install switch disabling key.
2. ensure power supply is on/has correct voltage.
3. test for good contacts; correct the wiring.
4. test/replace if faulty.
5. Correct motor wiring connections.
6. ensure circuit size is correct/replace weak breaker.
7. Check/fix broken, disconnected, or corroded wires.
8. replace switch.
9. test/repair/replace.
1. decrease feed rate.
2. only sand wood, ensure moisture is below 20%.
3. Wire motor correctly.
4. test for good contacts/correct wiring.
5. test/repair/replace.
6. Clean/replace sandpaper; reduce feed rate/sanding
depth.
7. Clean motor, let cool, and reduce workload.
8. test/repair/replace.
1. Reduce load on motor.
2. Clean off motor to provide normal air circulation.
1. inspect/replace damaged bolts/nuts, and re-tighten
with thread locking fluid.
2. fix/replace fan cover; replace loose/damaged fan.
3. test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
4. inspect and repair/replace.
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