Grizzly G0486/G0487 owner manual Roller section

Troubleshooting

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

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.

G0486/G0487 Wide Belt Sander -39-