Grizzly 12" Drum Sander G0459 - Manual (Page 30)

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Model G0459/G0459P (Mfg. 7/11+)
symptom possible Cause possible solution
Machine stalls or is
underpowered. 1. dust collection ducting is at fault.
2. low power supply voltage.
3. belt is slipping.
4. Motor connection is wired incorrectly.
5. plug or receptacle is at fault.
6. pulley or sprocket is slipping on shaft.
7. Motor bearings are at fault.
8. Machine is undersized for the task.
9. Motor has overheated.
10. Centrifugal switch is at fault.
11. Motor is at fault.
1. seal all leaks, size ducts correctly, eliminate bends,
and refer to dust Collection basics handbook (isbn
0-9635821-2-7) for further recommendations.
2. Make sure all hot lines and grounds are operational
and have correct voltage on all legs.
3. replace bad belt, align pulleys, and re-tension.
4. Correct motor wiring (see
Page 45).
5. test power plug and receptacle for good contact and
correct wiring.
6. replace loose pulley and shaft.
7. rotate motor shaft for noisy or burnt bearings,
repair/replace as required.
8. use new sandpaper with appropriate grit, and reduce
the feed rate/depth of sanding.
9. unobstructed motor cooling air flow, let motor cool,
and reduce workload on machine.
10. adjust or replace the centrifugal switch.
11. test, repair or replace motor.
Machine lacks
power; drum stops
turning under load.
1. v-belt loose.
2. too much pressure on pressure rollers.
1. tighten v-belt ( Page 30).
2. reduce pressure roller pressure ( Page 35).
Machine slows when
sanding,
making
a squealing noise,
especially on start-
up.
1. v-belt loose.
2. v-belt worn out.
1. tighten v-belt ( Page 30).
2. replace v-belt ( Page 31).
loud repetitious
noise coming from
machine. 1. pulley setscrews or keys are missing or
loose.
2. Motor fan is hitting the cover.
3. v-belt is defective.
1. inspect keys and setscrews. replace or tighten if
necessary.
2. adjust fan cover mounting position, tighten fan, or
shim fan cover.
3. replace v-belt ( Page 31).
vibration when
sanding.
1. loose drum pillow block bearings.
2. Worn drum pillow block bearings. 1. tighten drum pillow block bearings.
2. replace drum pillow block bearings.
grinding,
screeching, or
rubbing noise when
sanding drum is
powered up. 1. drum bearings lack sufficient grease.
2. drum bearings are worn and need
replacement.
1. grease the pillow block bearings ( Page 26).
2. replace the drum bearings.
Sanding Operations