Grizzly G7873, G4181 owner manual Service, Troubleshooting

SECTION 6: SERVICE

Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel- ops. 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

Motor & Electrical

Symptom	Possible Cause		Possible Solution
Motor will not start.	1.	Low voltage.	1.	Check power supply for proper voltage.
	2.	Open circuit in motor or loose connections.	2.	Inspect all lead connections on motor and circuit
				board for loose or open connections.
	3.	Blown fuse tripped circuit breaker.	3.	Repair for cause of overload and replace fuse or
				reset circuit breaker.
	4.	Start capacitor isat fault.	4.	Replace start capacitor.
	5.	Motor switch or motor is at fault.	5.	Replace switch, or motor.
Fuses or circuit	1.	Short circuit in line cord or plug.	1.	Inspect cord or plug for damaged insulation and
breakers trip.				shorted wires and replace extension cord.
	2.	Short circuit in motor or loose connections.	2.	Inspect all connections on motor for loose or
				shorted terminals or worn insulation.
	3.	Power feeder rollers are jammed.	3.	Disconnect all machinery from power and correct
				for cause of jamming.
Motor overheats.	1.	Motor overloaded.	1.	Reduce power feeder feed rate.
	2.	Air circulation through the motor restricted.	2.	Clean out motor fan cover to provide normal air
				circulation.
Workpiece jams	1.	Rollers set too low.	1.	Raise feeder.
when feeding under	2.	Feeder at wrong angle.	2.	Adjust angle.
rollers.
Workpiece slips	1.	Rollers positioned too high, no traction.	1.	Lower feeder.
while passing	2.	Feeding too fast.	2.	Slow feed speed.
beneath rollers.	3.	Rollers are dirty or oily.	3.	Clean roller surface with a mild solvent.
	4.	Worn roller(s).	4.	Replace roller(s) (Page 22).
Workpiece cut is	1.	Wrong feed speed.	1.	Adjust feed speed.
burnt.	2.	Cutter is at fault.	2.	Sharpen or replace dull blade or cutter.
Rough finish or	1.	Feed speed too fast.	1.	Slow speed.
chipped grain on	2.	Dull cutter or blade.	2.	Replace with sharp cutter or blade.
workpiece.	3.	Power feeder angle is not toed in to keep	3.	Adjust power feeder so it is toed-in 1° to 1.5°
		workpiece against the fence.		toward the fence.
Fuzzy grain occurs	1.	Lumber has high moisture content.	1.	If moisture content is higher than 20%, sticker and
when planing or				allow to dry.
moulding.	2.	Dull knives/cutter.	2.	Sharpen or replace knives.
Workpiece hangs	1.	Power feeder roller height is set incorrectly.	1.	Lower the power feeder roller 1⁄8" lower than the
and does not enter				height of the workpiece.
the machine.

Model G4181/G7873 1-HP Power Feeder -21-