Grizzly G0449 instruction manual About Service, Troubleshooting

SECTION 7: SERVICE

About Service

This section is provided for your convenience—it is not a substitute for the Grizzly Service Department. If any adjustments arise that are not described in this manual, you need replacement parts, or you are unsure of how to perform the procedures in this section, then feel free to call our Technical Support line.

Troubleshooting

Symptom	Possible Cause			Possible Solution
Motor will not start.	1. Low voltage.			1. Check power line for proper voltage.
	2. Open circuit in motor or loose connec-			2. Inspect all lead connections on motor
	tions.			for loose or open connections.
	3. Start capacitor at fault.			3. Replace start capacitor.
Motor will not start; fuses or circuit break-	1. Short circuit in line cord or plug.			1. Repair or replace cord or plug for dam-
ers blow.				aged insulation and shorted wires.
Motor fails to develop full power (output	1. Power line overloaded with lights, appli-			1. Reduce load on power line.
of motor decreases rapidly with decrease	ances, and other motors.
in voltage at motor terminals).	2. Undersized wires or circuits too long.			2. Increase wire sizes or reduce length of
				the circuit.
	3. General overloading of power company			3. Request a power check from the power
	facilities.			company.
Motor overheats.	1. Motor overloaded.			1. Reduce load on motor.
	2. Air circulation	through	the motor	2. Clean off motor to provide normal air
	restricted.			circulation.
Motor stalls (resulting in blown fuses or	1. Short circuit in motor or loose connec-			1. Repair or replace connections on motor
tripped circuit).	tions.			for loose or shorted terminals or worn
				insulation.
	2. Low voltage.			2. Correct the low voltage conditions.
	3. Incorrect fuses	or circuit	breakers in	3. Install correct fuses or circuit breakers.
	power line.
	4. Motor overloaded.			4. Reduce load on motor.
Drums run backwards (G0450 only).	1. Two of the power wires are reversed			1. Switch two of the current carrying wires
	(G0450 only).			at the main power block (G0450 only).
Machine slows when sanding, making a	1. V-belts loose.			1. Tighten V-belts (Page 30).
squealing noise, especially on start-up.	2. V-belts worn out.			2. Replace V-belts (Page 31).
Loud repetitious noise coming from	1. Pulley setscrews or keys are missing or			1. Inspect keys and setscrews. Replace
machine.	loose.			or tighten if necessary.
	2. Motor fan is hitting the cover.			2. Adjust fan cover mounting position,
				tighten fan, or shim fan cover.
	3. V-belts are defective.			3. Replace V-belts (Page 31).
Vibration when sanding.	1. Loose drum pillow bearings.			1. Tighten drum pillow bearings.
	2. Worn drum pillow bearings.			2. Replace drum pillow bearings.
-28-				G0449/G0450 37" Drum Sander