Grizzly H7761 owner manual Service, Troubleshooting

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support at (570) 546-9663.

Troubleshooting

SYMPTOM					POSSIBLE CAUSE		CORRECTIVE ACTION
Motor		will		not	1.	Low voltage.	1.	Check power line voltage and correct if necessary.
start.					2.	Open circuit in motor or loose connections.	2.	Inspect all connections on motor for loose or open
								connections.
Motor		will		not	1.	Loose connections or short circuit in line cord,	1.	Inspect cord, plug and motor for damaged insula-
start; fuses/circuit						plug, or motor.		tion, shorted wires or loose terminals.
breakers blow.					2.	Incorrect fuses or circuit breakers in power line.	2.	Install correct fuses or circuit breakers.
Motor			stalls		1.	Motor overloaded.	1.	Reduce load on motor.
(resulting				in	2.	Short circuit in motor or loose connections.	2.	Inspect connections on motor for loose or shorted
blown		fuses		or				terminals or worn insulation.
tripped circuit).					3.	Low voltage.	3.	Check power line voltage and correct if necessary.
					4.	Incorrect fuses or circuit breakers in power line.	4.	Install correct fuses or circuit breakers.
Machine			slows		1.	Workpiece pressure is too great.	1.	Reduce workpiece pressure on wheel.
when operating.
Machine vibrates					1.	Machine not mounted securely.	1.	Secure machine to benchtop or stand.
excessively.					2.	Incorrect sanding belt tracking.	2.	Follow belt tracking instructions on Page 15.
					3.	Weak or broken tension spring.	3.	Replace spring.
					4.	Broken/defective sanding belt.	4.	Replace sanding belt.
					5.	Sanding disc rubbing or not centered properly.	5.	Adjust sanding table to prevent disc contact.
Sanded		surface			1.	Table not perpendicular to disc.	1.	Adjust table tilt.
not square.					2.	Miter gauge not square to disc.	2.	Adjust miter gauge.
Deep		sanding			1.	Sandpaper damaged or clogged.	1.	Clean and/or replace sanding surface.
grooves or scars					1.	Sandpaper too coarse for the desired finish.	1.	Use a finer grit sanding belt or disc.
in workpiece.					2.	Workpiece sanded across the grain.	2.	Sand with the grain.
					3.	Too much sanding force on workpiece.	3.	Reduce pressure on workpiece while sanding.
					4.	Workpiece held still against the belt or disc.	4.	Keep workpiece moving while sanding.
Grains rub off the					1.	Sanding belt or disc has been stored in an incor-	1.	Store sanding belt or disc away from damp condi-
belt or disc eas-						rect environment.		tions.
ily.					2.	Sanding belt or disc has been damaged.	2.	Store sanding belt or disc flat, not folded or bent.
Sanding surfaces					1.	Too much pressure against belt or disc.	1.	Reduce pressure on workpiece while sanding.
clog	quickly			or	2.	Sanding softwood.	2.	Use different stock or plan on cleaning/replacing
burn.								belts frequently.
Burn	marks			on	1.	Using too fine of sanding grit.	1.	Use a coarser grit sanding belt or disc.
workpiece.					2.	Using too much pressure.	2.	Reduce pressure on workpiece while sanding.
					3.	Work held still for too long.	3.	Do not keep workpiece in one place for too long.
Glazed		sanding			1.	Sanding wet stock.	1.	Dry stock properly before sanding.
surfaces.					2.	Sanding stock with high residue.	2.	Use different stock or plan on cleaning/replacing
								belts/discs frequently.
Workpiece			kick-		1.	Not supporting the workpiece against the stop.	1.	Use back stop to support workpiece.
back or vibration.					2.	Starting the workpiece on a leading corner.	2.	Start workpiece on a trailing corner.
H7761 2" x 27" Belt & 6" Disc Combo Sander								-23-