Grizzly G0866 Owner's Manual page 48

Motor & Electrical (Cont.)
Symptom Possible Cause
Machine slows 1. Feed rate too high.
when operating.
2. Excessive depth of cut.
3. Sanding belt grit too fine for job.
Machine has 1. Motor or component loose.
vibration or
noisy operation.
2. V-belt(s) worn, loose, pulleys misaligned, or
belt slapping cover.
3. Machine not secured to floor.
4. Motor fan rubbing on fan cover.
5. Motor bearings at fault.
6. Conveyor gearbox at fault.
Operation
Symptom Possible Cause
Loud, repetitive 1. Pulley set screws or keys missing or loose.
noise coming
from machine.
2. Motor fan rubbing on fan cover.
3. V-belt(s) defective or damaged.
Machine is 1. Excessive depth of cut.
loud, overheats
2. Sanding belt worn/clogged.
or bogs
down during
operation.
Rounded 1. Excessive depth of cut.
workpiece
edges.
Uneven 1. Sanding belt worn unevenly.
thickness from
left to right of
2. Feed table not parallel to upper frame.
board.
3. Conveyor belt worn.
Workpiece slips 1. Pressure rollers set too high.
on conveyor
2. Dirty/worn conveyor belt.
belt.
Grooves down 1. Pressure rollers dirty/damaged.
length of
2. Platen set too low.
workpiece.
3. Platen graphite pad damaged.
Snake-shaped 1. Sanding belt dirty/damaged.
marks on
2. Pressure rollers dirty/damaged.
workpiece.
Lines across 1. Sanding belt seam open/damaged.
width of
2. Platen set too low.
workpiece.
Glossy spots 1. Worn sanding belt.
or streaks on
2. Rear pressure roller too low.
workpiece.
3. Feed rate too low.
4. Platen set too low.
5. Graphite or felt pad worn/damaged.
6. Using amp load meter to establish material
removal amount.
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Possible Solution
1. Reduce feed rate (Page 37).
2. Reduce depth of cut.
3. Replace with coarser grit sanding belt (Page 35).
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Inspect/replace belts with a new matched set
(Page 60). Realign pulley if necessary.
3. Tighten mounting bolts; relocate/shim machine.
4. Fix/replace fan cover; replace loose/damaged fan.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Rebuild gearbox for bad gear(s)/bearing(s).
Possible Solution
1. Inspect pulley keys and set screws. Replace or tighten
if necessary.
2. Fix/replace fan cover; replace loose/damaged fan.
3. Replace V-belt(s) (Page 60).
1. Decrease depth of cut.
2. Clean/replace sanding belt (Page 35 & 44).
1. Reduce depth of cut.
1. Replace sanding belt (Page 35). Feed workpieces
evenly across sanding belt, not just on one side.
2. Adjust feed table (Page 55).
3. Replace conveyor belt (Page 64).
1. Lower pressure rollers (Page 58).
2. Clean/replace conveyor belt (Page 64).
1. Clean/repair/replace pressure rollers.
2. Raise platen to reduce pressure (Page 36).
3. Replace graphite pad (Page 51).
1. Clean/replace sanding belt (Pages 35 & 44).
2. Clean/repair pressure rollers.
1. Replace sanding belt (Page 35).
2. Raise platen to reduce pressure (Page 36).
1. Replace sanding belt (Page 35).
2. Raise rear pressure roller (Page 58).
3. Increase feed rate (Page 37).
4. Raise platen to reduce pressure (Page 36).
5. Replace graphite or felt pad (Page 51).
6. Use alternate methods to establish material removal
amount (Page 34).
Model G0866 (Mfd. Since 11/18)