Grizzly G0554Z owner manual Service, Troubleshooting, Motor & Gearbox

SECTION 7: 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 & Gearbox

Symptom	Possible Cause		Possible Solution
Motor will not	1.	Stop button not reset.	1.	Reset stop button.
start.	2.	Main power switch is OFF.	2.	Turn the main power switch ON.
	3.	Left side door is open and limit switch is	3.	Close and secure the left side door.
		tripped.
	4.	Circuit breaker or fuse has tripped.	4.	Seek an electrician to troubleshoot and repair the
				power supply.
	5.	No voltage or open connection.	5.	Test circuit, replace wires and connections as
				required.
	6.	Capacitor is at fault.	6.	Replace capacitor.
	7.	Spindle switch(es) are at fault.	7.	Replace switch(es).
	8.	Main power switch, stop button, or magnetic	8.	Test/replace.
		contactor is at fault.
	9.	Side door or foot brake limit switch is at fault.	9.	Replace limit switch(es).
	10.	Motor is at fault.	10.	Replace 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.
open.	2.	Short circuit in motor or loose connections.	2.	Inspect all connections on motor for loose or shorted
				terminals or worn insulation.
	3.	Incorrect fuses or circuit breakers in power	3.	Install correct fuses or circuit breakers.
		supply.
Machine is loud;	1.	Excessive depth of cut.	1.	Decrease depth of cut.
V-belts slip	2.	Spindle speed or feed rate wrong for	2.	Set the proper spindle speed and feed rate
when cutting.		operation.		(Page 40).
Overheats or	3.	Dull cutting tools.	3.	Sharpen or replace cutting tools.
bogs down in the	4.	V-belts are slipping.	4.	Inspect/tension/replace V-belts.
cut.
Gear change	1. Gears not aligned in headstock.		1.	Maintain pressure on the lever and rotate spindle by
levers will not				hand until gear falls into place.
shift into position.
Loud, repetitious	1.	Pulley set screws or keys are missing or	1.	Inspect keys and set screws. Replace or tighten if
noise coming		loose.		necessary.
from machine	2.	Motor fan is hitting the cover.	2.	Tighten fan or shim cover, or replace items.
at or near the
motor.
Motor is loud	1.	Excessive depth of cut or feed rate.	1.	Decrease depth of cut or feed rate.
when cutting.	2.	Spindle speed or feed rate wrong for cutting	2.	Refer to RPM feed rate chart for appropriate rates.
Overheats or		operation.
bogs down in the	3.	Cutting tool is dull.	3.	Sharpen or replace the cutting tool.
cut.	4.	Quick change gear setup is too tight, causing	4.	Re-adjust the quick change gear setup with a small
		them to bind.		amount of backlash so the gears move freely and
				smoothly when the spindle is rotated by hand.
-56-				Model G0554Z (Mfg 01/09+)