Grizzly G0449 Owner's Manual page 34

Motor & Electrical Continued
Symptom Possible Cause
Machine stalls or is 10. Motor is at fault.
overloaded.
11. Air circulation through the motor restricted.
Machine Operations
Symptom Possible Cause
Drums run back- 1. Two of the power wires are reversed (G0450
wards (G0450
only).
only).
Machine slows 1. V-belts loose.
when sanding, mak-
2. V-belts worn out.
ing squealing noise,
especially on start-
up.
Loud repetitious 1. Pulley setscrews or keys are missing or
noise coming from
loose.
machine.
2. Motor fan is hitting the cover.
3. V-belts are defective.
Vibration when 1. Loose drum pillow bearings.
sanding.
2. Worn drum pillow bearings.
Grinding, screech- 1. Drum bearings lack sufficient grease.
ing, or rubbing noise
2. Drum bearings worn.
when sanding drums
are powered up.
Short V-belt lifes- 1. Pulleys not aligned correctly.
pan.
2. Improperly tensioned.
Machine lacks 1. V-belts loose.
power; drums stop
2. Too much pressure on pressure rollers.
turning under load.
Conveyor slips 1. Conveyor is too loose.
under load.
2. Too much load.
Conveyor tracks to 1. Conveyor tracking is incorrect.
one side; conveyor
hits the roller cover.
Workpiece pulls 1. One of the sanding drums is not parallel
to one side during
with the table.
sanding operations.
Excessive snipe. 1. Too much pressure roller pressure.
2. Too much pressure from rear pressure roll-
ers.
3. Lack of outfeed support.
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Possible Solution
10. Test/repair/replace.
11. Clean off motor to provide normal air circulation.
Possible Solution
1. Switch two of the current carrying wires at the main
power block (G0450 only). (Page 20)
1. Tighten V-belts (Page 34).
2. Replace V-belts (Page 35).
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-belts (Page 35).
1. Tighten drum pillow bearings.
2. Replace drum pillow bearings.
1. Grease the pillow bearings (Page 29).
2. Replace the drum bearings.
1. Align pulleys (Page 35).
2. Properly tension V-belts (Page 34).
1. Tighten V-belts (Page 34).
2. Reduce pressure roller pressure (Page 44).
1. Tension conveyor (Page 38).
2. Decrease load.
1. Track the conveyor so it runs straight (Page 39).
1. Adjust the sanding drums parallel to the table (Page
39).
1. Reduce pressure roller pressure (Page 44).
2. Reduce rear pressure roller pressure (Page 44).
3. Set up outfeed table or have someone catch the
workpiece as it comes out.
G0449/G0450 37" Drum Sander