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Service
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. ON/OFF switch disabling key removed.
start, or power
2. Interlock switch disabling key(s) removed.
supply breaker
3. Machine circuit breaker tripped or at fault.
immediately trips
4. Incorrect power supply voltage or circuit
after startup.
size.
5. Power supply circuit breaker tripped or fuse
blown.
6. Wiring broken, disconnected, or corroded.
7. Motor brushes worn out.
8. ON/OFF or circuit breaker switch at fault.
9. Interlock switch at fault.
10. Motor or motor bearings at fault.
Machine stalls or is
1. Workpiece material unsuitable for machine.
underpowered.
2. Feed rate/cutting speed too fast.
3. Excessive depth of cut.
4. Machine undersized for task.
5. Belt(s) slipping/pulleys misaligned.
6. Motor brushes worn out.
7. Pulley/sprocket slipping on shaft.
8. Motor overheated, tripping machine circuit
breaker.
9. Extension cord too long.
10. Motor or motor bearings at fault.
Machine has
1. Motor or component loose.
vibration or noisy
operation.
2. Feet not adjusted properly.
3. V-belt(s) worn, loose, pulleys misaligned or
belt slapping cover.
4. Insert(s) at fault.
5. Pulley loose.
6. Motor mount loose/broken.
7. Cutterhead bearings at fault.
8. Motor bearings at fault.
Model G0958/G0959 (Mfd. Since 05/22)
Troubleshooting
Possible Solution
1. Install ON/OFF switch disabling key.
2. Install interlock switch disabling key(s).
3. Reset circuit breaker on switch.
4. Ensure correct power supply voltage and circuit
size.
5. Ensure circuit is free of shorts. Reset circuit breaker
or replace fuse.
6. Fix broken wires or disconnected/corroded
connections (Page 54).
7. Remove/replace brushes (Page 52).
8. Replace switch/circuit breaker.
9. Replace switch.
10. Replace motor.
1. Only cut wood/ensure moisture is below 20% (Page
27).
2. Decrease feed rate/cutting speed (jointer).
3. Decrease depth of cut (Pages 30 & 36).
4. Use correct/sharp inserts (Page 38). Reduce feed
rate or depth of cut (Pages 30 & 36).
5. Clean/tension/replace belt(s); ensure pulleys are
aligned (Page 46).
6. Replace motor brushes (Page 52).
7. Tighten/replace loose pulley/shaft.
8. Clean motor, let cool, and reduce workload. Reset
breaker.
9. Move machine closer to power supply; use shorter
extension cord.
10. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Adjust feet to stabilize machine.
3. Inspect/replace belts with a new matched set. Re-
align pulleys if necessary (Page 46).
4. Replace/rotate insert(s) (Page 38).
5. Secure pulley on shaft.
6. Tighten/replace.
7. Replace bearing(s)/realign cutterhead.
8. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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