Section 7: Service; Troubleshooting - Grizzly T33959 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 1. Emergency Stop button depressed.
not start, or
2. Chip guard open.
power supply
3. Incorrect power supply voltage or circuit size.
breaker
immediately
4. Power supply circuit breaker or fuse blown.
trips after
startup.
5. Motor wires connected incorrectly.
6. Wiring broken, disconnected, or corroded.
7. ON/OFF switch at fault.
8. Emergency Stop button at fault.
9. Chip guard micro switch at fault.
10. Motor or motor bearings at fault.
Machine 1. Workpiece material unsuitable for machine.
stalls or is
underpowered.
2. Feed rate/cutting speed too fast.
3. V-belt(s) slipping/pulleys misaligned.
4. Motor wires connected incorrectly.
5. Pulley slipping on shaft.
6. Machine undersized for task.
7. Motor overheated.
8. Run capacitor at fault.
9. Extension cord too long.
10. Motor or motor bearings at fault.
Machine has 1. Motor or component loose.
vibration or
noisy operation.
2. V-belt(s) worn, loose, pulleys misaligned or
belt slapping cover.
3. Pulley loose.
4. Motor mount loose/broken.
5. Spindle loose, improperly installed or
damaged.
6. Workpiece loose.
7. Chuck or cutter at fault.
Model T33959/60/61 (Mfd. Since 08/23)

Troubleshooting

Possible Solution
1. Rotate Emergency Stop button head to reset.
2. Close chip guard.
3. Ensure correct power supply and circuit size
(Page 13).
4. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
5. Correct motor wiring connections (Page 53).
6. Fix broken wires or disconnected/corroded
connections (Page 53).
7. Replace switch.
8. Replace Emergency Stop button.
9. Replace micro switch.
10. Replace motor.
1. Only cut wood with moisture below 20% and correct
type/size of metal.
2. Decrease feed rate/cutting speed (Page 31).
3. Clean/tension/replace V-belt(s) (Page 43); ensure
pulleys are aligned.
4. Correct motor wiring connections (Page 53).
5. Tighten/replace loose pulley/shaft.
6. Use sharp bits/reduce feed rate/reduce spindle RPM
(Page 31).
7. Clean motor, let cool, and reduce workload.
8. Test/repair/replace.
9. Move machine closer to power supply; use shorter
extension cord (Page 14).
10. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Inspect/replace V-belt(s) with new matched set
(Page 43). Realign motor pulley if necessary
(T33960/T33961 only).
3. Secure pulley on shaft.
4. Tighten/replace.
5. Tighten loose spindle, re-install spindle ensuring
mating surfaces are clean, replace spindle if damaged.
6. Use correct holding fixture and reclamp workpiece.
7. Replace out-of-round chuck; dull, or bent cutter.
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