Grizzly G0527 instruction manual Machine Troubleshooting, Symptom Possible Cause Corrective Action

Machine Troubleshooting

SYMPTOM			POSSIBLE CAUSE		CORRECTIVE ACTION
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.
Motor will not start.			1.	Low voltage.	1.	Check power line for proper voltage.
			2.	Open circuit in motor or loose con-	2.	Inspect all lead connections on motor for loose or open connections.
				nections.
Motor will not start; fuses or			1.	Short circuit in line cord or plug.	1.	Inspect cord or plug for damaged insulation and shorted wires.
circuit breakers blow.			2.	Short circuit in motor or loose con-	2.	Inspect all connections on motor for loose or shorted terminals or
				nections.		worn insulation.
			3.	Incorrect fuses or circuit breakers	3.	Install correct fuses or circuit breakers.
				in power line.
Motor overheats.			1.	Motor overloaded.	1.	Reduce load on motor.
			2.	Air circulation through the motor	2.	Clean out motor to provide normal air circulation.
				restricted.
Motor stalls	(resulting in		1.	Short circuit in motor or loose con-	1.	Inspect connections on motor for loose or shorted terminals or worn
blown fuses or tripped cir-				nections.		insulation.
cuit).			2.	Low voltage.	2	Correct the low voltage conditions.
			3.	Incorrect fuses or circuit breakers	3.	Install correct fuses or circuit breakers.
				in power line.
			4.	Motor overloaded.	4.	Reduce load on motor.
Loud, repetitious noise com-			1.	Pulley set screws or keys are miss-	1.	Inspect keys and set screws. Replace or tighten if necessary.
ing from machine.				ing or loose.
			2.	Motor fan is hitting the cover.	2.	Tighten fan or shim cover.
			3.	V-belt is defective.	3.	Replace V-belt. See Maintenance section.
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 place more tension on .
				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.
Machine slows when oper-			1.	Feed rate too high.	1.	Feed workpiece slower.
ating.			2.	Depth of cut too great.	2.	Reduce depth of cut.

G0527 18" Wide Belt Sander -53-