Section 7: Service; Troubleshooting - Grizzly G0925 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting 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. Note: Please gather the
serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. Switch disabling key removed.
start, or power
2. Incorrect power supply voltage or circuit
supply fuse/breaker
trips immediately
3. Power supply circuit breaker tripped or fuse
after startup.
4. Wiring broken, disconnected, or corroded.
5. ON/OFF switch at fault.
6. Motor at fault.
Machine stalls or is
1. Incorrect bit/cutter for task.
underpowered.
2. Feed rate/cutting speed too fast.
3. Dull bit/cutter.
4. Belt slipping.
5. Machine undersized for task.
6. Motor overheated.
7. Pulley slipping on shaft/pulleys misaligned.
8. Run capacitor at fault.
9. Motor or motor bearings at fault.
Machine has 1. Motor or component loose.
vibration or noisy
operation.
2. V-belt worn/belt slapping cover.
3. Incorrectly mounted to workbench.
4. Pulley loose or misaligned.
5. Motor mount loose/broken.
6. Spindle loose, improperly installed or
7. Workpiece loose.
8. Motor fan rubbing on fan cover.
9. Spindle bearings at fault.
10. Chuck or cutter at fault.
11. Motor bearings at fault.
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Troubleshooting

size.
blown.
damaged.
Possible Solution
1. Install switch disabling key.
2. Ensure correct power supply voltage and circuit
size (Page 10).
3. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
4. Fix broken wires or disconnected/corroded
connections (Page 32).
5. Replace.
6. Test/repair/replace.
1. Use correct bit/cutter for task.
2. Decrease feed rate/cutting speed (Page 20).
3. Sharpen bit/cutter or replace.
4. Ensure belt is oil free, tension/replace belt
(Page 20).
5. Use correct cutter/bit; reduce feed rate; reduce
spindle RPM; use cutting fluid if possible.
6. Clean motor/let cool, and reduce workload.
7. Tighten loose pulley; replace broken/missing parts.
Ensure pulleys are aligned.
8. Test/replace if at fault.
9. Test/repair/replace.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Inspect/replace belt (Page 20).
3. Shim or tighten mounting hardware (Page 14).
4. Secure pulley on shaft and align (Page 31).
5. Tighten/replace.
6. Tighten loose spindle, install spindle with clean
mating surfaces, replace spindle if damaged.
7. Use the correct holding fixture for workpiece.
8. Fix/replace fan cover; replace loose/damaged fan.
9. Test by rotating spindle; rotational grinding/loose
shaft requires bearing replacement.
10. Replace out-of-round chuck, dull, or bent cutter.
11. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
Model G0925 (Mfd. Since 02/20)