Grizzly G3358 owner manual Service, Troubleshooting, Motor & Electrical

Troubleshooting

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 & Electrical

Symptom	Possible Cause		Possible Solution
Machine does not	1.	Plug/receptacle is at fault or	wired 1.	Test for good contacts; correct the wiring.
start or a breaker		incorrectly.
trips.	2.	Motor connection wired incorrectly.	2.	Correct motor wiring connections.

3.Wall fuse/circuit breaker is blown/tripped. 3. Ensure circuit size is suitable for this machine; replace weak breaker.

	4.	Power supply switched OFF or is at fault.	4.	Ensure power supply is switch on; ensure power
				supply has the correct voltage.
	5.	Wiring is open/has high resistance.	5.	Check for broken wires or disconnected/corroded
				connections, and repair/replace as necessary.
	6.	Main power switch is at fault.	6.	Replace faulty FWD/OFF/REV switch.
	7.	Motor is at fault.	7.	Test/repair/replace.
Machine stalls or is	1.	Feed rate/cutting speed too fast for task.	1.	Decrease feed rate/cutting speed.
overloaded.	2.	Workpiece alignment is poor.	2.	Eliminate workpiece binding; use jig or clamps and
				position table properly for workpiece alignment
				control.
	3.	Wrong cutter type.	3.	Use cutter with correct properties for your type of
				machining.
	4.	Motor connection is wired incorrectly.	4.	Correct motor wiring connections.
	5.	V-belt(s) slipping.	5.	Replace bad V-belt(s).
	6.	Plug/receptacle is at fault.	6.	Test for good contacts; correct the wiring.
	7.	Motor bearings are at fault.	7.	Test by rotating shaft; rotational grinding/loose shaft
				requires bearing replacement.
	8.	Machine is undersized for the task.	8.	Use smaller sharp cutters/drill bits; reduce the feed
				rate; reduce the spindle RPM; use cutting fluid if
				possible.
	9.	Motor has overheated.	9.	Clean off motor, let cool, and reduce workload.
	10.	Spindle rotation switch at fault.	10.	Test/repair/replace switch.
	11.	Motor is at fault.	11.	Test/repair/replace motor.

-30- G3358 Milling/Drilling Machine