Harbor Freight Tools 91146 operating instructions Troubleshooting Guide Welding GUN & Wire Drive

TROUBLESHOOTING GUIDE - WELDING GUN & WIRE DRIVE

Problem		Possible Cause
No arc.	1.	Interruption of welding power circuit to welding
		gun or workpiece.
	2.	Power source or control defective.
	3.	Trigger wire broken, cut, or disconnected.
	4.	Power source contractor not activated.
Arc between gas nozzle	1.	Spatter build-up inside gas nozzle.
and workpiece.
Welding gun body or	1.	Welding current too high.
power cable overheated.	2.	Contact tip not correctly tightened.
	3.	Ground clamp making poor contact.
Welding wire melted	4.	Wire feed starts too late (burn-back).
onto contact tip.	5.	Wire jammed in liner due to dirt accumulation
		in liner or extreme bending of cable assembly.
	6.	Feed rate too low.
	7.	Contact tip too far away from workpiece.
	8.	Burn-back time set too long.
Irregular wire feed.	9.	Drive roll pressure too low or too high.
	10. Faulty or worn liner.
	11. Incorrect type or size of liner, or liner
		incorrectly attached.
	12. Faulty wire feed control.
	13. Drive rolls worn or incorrectly installed. Incorrect
		Size of drive rolls used.

INSPECTION, MAINTENANCE, AND CLEANING - WELDING MACHINE

1.WARNING! Make sure the Power Switch (10) is in its “OFF” position. Unplug the Power Cord Plug from its electrical outlet, and allow the Welder to completely cool before performing any inspection, maintenance, or cleaning procedures. Note: Always ground the contact tip to insure that there is no residual energy in the Welder.

2.Before each use, inspect the general condition of the Welder. Check for damaged electrical wiring, loose connections, cracked, burnt, or broken parts, and any other condition that may affect its safe operation. If abnormal noise or vibration occurs, have the problem corrected before further use.

Do not use damaged equipment.

3.Every six months: Blow off or vacuum dirt and dust deposits on the Auxiliary Transformer (23) and other components. Dirt or dust deposits on the Welding Transformer and other internal components may reduce the insulating property or cause overheated Transformer. During heavy usage, clean monthly.

SKU 91146 For technical questions, please call 1-800-444-3353. PAGE 22