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G0486/G0487 Wide Belt Sander -39-
Troubleshooting
For your safety, turn the
power switch off and dis
-
connect the sander from the
power source and the air
supply before starting the
applicable troubleshooting.
Symptom Possible Cause Possible Solution
Lines across width
of workpiece.
1. Sanding belt seam is open or damaged. 1. Repair or replace sanding belt.
Glossy spots
or streaks on
workpiece.
1. Worn sanding belt.
2. Rear pressure roller too low.
1. Replace sanding belt.
2. Raise rear pressure roller. (See warning in Pressure
Roller section, Page
18!)
Sanding belt clogs
quickly.
1. Sanding belt grit too small for particular job.
2. Excessive depth of cut.
3. Wood is too moist.
1. Replace with a coarser grit sanding belt.
2. Reduce depth of cut.
3. Allow wood to dry out.
Sanding belt does
not tension correct
-
ly; rollers slip under
belt.
1. Low air pressure.
2. Air leaks in system.
1. Adjust air pressure to 75 PSI at primary regulator.
2. Inspect all hoses and connections for leaking air; use water
on suspected area to detect bubbles.
Sanding belt runs
off to one side, stop
-
ping the sander.
1. Air eye fork clogged.
2. Oscillation return valve closed.
3. Oscillation timing incorrect.
1. Clean the intake hole on the air eye fork.
2. Open valve.
3. Adjust oscillation timing.
Sanding belt will not
start.
1. Sanding belt is not tensioned.
2. Limit switches engaged.
3. Emergency stop plate engaged.
1. Tension sanding belt.
2. Center sanding belt so it is not touching the limit switches.
3. Make sure emergency stop switch is released.
Poor, non-aggres
-
sive sanding
results.
1. Worn sanding belt.
2. Sanding belt loaded with sawdust.
1. Replace sanding belt with a new one.
2. Clean sanding belt to unload sawdust.
Conveyor belt not
tracking in center.
1. Conveyor rollers moved out of adjustment. 1. Re-adjust conveyor rollers.
Conveyor belt slip
-
ping.
1. Conveyor rollers have incorrect tension.
2. Conveyor rollers contaminated with dirt or dust.
1. Adjust conveyor rollers to place more tension on the
workpiece.
2. Clean conveyor rollers.
Emergency brake
stops slow.
1. Air pressure incorrect.
2. Air leak in system.
3. Brake rotor contaminated with oil.
4. Brake pads worn out.
1. Adjust air pressure to 75 PSI.
2. Find and fix air leaks.
3. Clean brake rotor with automotive brake parts cleaner.
4. Replace brake pads.
Grinding noise when
braking.
1. Brakes severely worn out. 1. Replace brake pads, have rotor turned (possibly
replaced).