Grizzly G0449 Instruction Manual page 31

Symptom
Grinding, screeching, or rubbing noise
when sanding drums are powered up.
Short V-belt lifespan.
Machine lacks power; drums stop turning
under load.
Conveyor slips under load.
Conveyor tracks to one side; conveyor
hits the roller cover.
Workpiece pulls to one side during sand-
ing operations.
Excessive snipe.
Workpiece kicks out of sander.
Sandpaper tears off drums during opera-
tion.
Table elevation controls are stiff and hard
to adjust.
Poor dust collection.
G0449/G0450 37" Drum Sander
Possible Cause
1. Drum bearings lack sufficient grease.
2. Drum bearings are worn and need
replacement.
1. Pulleys not aligned correctly.
2. Improperly tensioned.
1. V-belts loose.
2. Too much pressure on pressure roll-
ers.
1. Conveyor is too loose.
2. Too much load.
1. Conveyor tracking is incorrect.
1. One of the sanding drums is not paral-
lel with the table.
1. Too much pressure from all the pres-
sure rollers.
2. Too much pressure from the rear pres-
sure rollers.
3. Lack of outfeed support.
1. Not enough pressure from the pressure
rollers.
1. Nail/staple in workpiece.
2. Sandpaper not tightened or fastened
correctly.
3. Drums not perpendicular to the feed
direction.
1. Table lock is engaged.
2. Table lift screws are dirty or loaded
with sawdust.
3. Chain idler roller sprocket lock nuts
have been tightened against the roller.
4. Elevation handle worm gear is dirty or
loaded with sawdust.
1. The dust scoops are incorrectly posi-
tioned.
2. Dust collection lines incorrectly sized
for this machine.
3. Dust collector underpowered or too far
away from this machine.
Possible Solution
1. Grease the pillow bearings (Page 26).
2. Replace the drum bearings.
1. Align pulleys (Page 31).
2. Properly tension V-belts (Page 30).
1. Tighten V-belts (Page 30).
2. Reduce pressure roller pressure (Page
36).
1. Tension conveyor (Page 32).
2. Decrease load.
1. Track the conveyor so it runs straight
(Page 32).
1. Adjust the sanding drums parallel to
the table (Page 33).
1. Reduce pressure roller pressure (Page
36).
2. Reduce rear pressure roller pressure
(Page 36).
3. Set up outfeed table or have someone
catch the workpiece as it comes out.
1. Increase pressure roller pressure
(Page 36).
1. Sand only clean workpieces.
2. Install the sandpaper correctly (Page
24).
3. Adjust the drums perpendicular to the
feed direction (Page 33).
1. Disengage table lock.
2. Clean and regrease table lift screws
(Page 27).
3. Adjust the lock nuts on the idler roller
sprocket so the roller can spin freely.
4. Remove the worm gear box, clean it,
and regrease it.
1. Experiment with the dust scoops moved
further in or out for better results. See
Page 37 for instructions on moving a
dust scoop.
2. Use at least an 8" main line with two 6"
branch lines that each Y into 4" at the
machine.
3. Upgrade your dust collector or decrease
the distance from the dust collector to
the machine.
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