Grizzly G9983 instruction manual Tion

TROUBLESHOOTING

SYMPTOM		POSSIBLE CAUSE		CORRECTIVE ACTION
Lines across width of work-		1.	Sanding belt seam is open or dam-	1.	Repair or replace sanding belt.
piece.			aged.
More material is removed		1.	Workpiece is not supported as it	1.	Hold workpiece up with your hands as it comes out, or set up an out-
from the end of workpiece			comes out of sander.		feed table for your workpiece after it comes out.
than the length (snipe).		2.	Pressure rollers not set correctly.	2.	Set pressure rollers as described in Section 8: Service Adjustments.
Glossy spots or streaks on		1.	Worn sanding belt.	1.	Replace sanding belt.
workpiece.		2.	Rear pressure roller too low.	2.	Raise rear pressure roller. (See warning in Pressure Roller sec-
					tion!)
Sanding belt clogs quickly.		1.	Sanding belt grit too small for par-	1.	Replace with a coarser grit sanding belt.
			ticular job.
		2.	Excessive depth of cut.	2.	Reduce depth of cut.
		3.	Wood is too moist.	3.	Allow wood to dry out.
Sanding belt does not ten-		1.	Low air pressure.	1.	Adjust air pressure to 75 PSI at primary regulator.
sion correctly; rollers slip		2.	Air leaks in system.	2.	Inspect all hoses and connections for leaking air; use water on sus-
under belt.					pected area to detect bubbles.
Sanding belt runs off to one		1.	Air eye fork clogged.	1.	Clean the intake hole on the air eye fork.
side, stopping the sander.		2.	Oscillation return valve closed.	2.	Open valve.
		3.	Oscillation timing incorrect.	3.	Adjust oscillation timing.
Sanding belt will not start.		1.	Sanding belt is not tensioned.	1.	Tension sanding belt.
		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-aggressive sand-		1.	Platen adjusted incorrectly, above	1.	Adjust platen on the same plane as, or lower than, bottom surface
ing results.			bottom surface level of lower sand-		level of lower rollers.
			ing rollers.
		2.	Sanding belt loaded with sawdust.	2.	Clean sanding belt to unload sawdust.
		3.	Sanding belt worn out.	3.	Replace sanding belt with a new one.
Conveyor belt not	tracking	1.	Conveyor rollers moved out of	1.	Re-adjust conveyor rollers.
in center.			adjustment.
Conveyor belt slipping.		1.	Conveyor rollers have incorrect	1.	Adjust conveyor rollers to increase tension.
			tension.
		2.	Conveyor rollers contaminated with	2.	Clean conveyor rollers.
			dirt or dust.
Emergency brake	stops	1.	Air pressure incorrect.	1.	Adjust air pressure to 75 PSI.
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 brak-		1.	Brakes severely worn out.	1.	Replace brake pads, have rotor turned (possibly replaced).
ing.

For your safety, turn switch OFF and dis- connect the machine from power source before any troubleshooting. Please refer to the adjustment section to make correc- tions.

G9983 15" Open-End Wide-Belt Sander -53-