Lincoln Electric IM613-B manual Possible Cause Recommended Symptoms Course of Action

E-3			TROUBLESHOOTING	E-3
		Observe all Safety Guidelines detailed throughout this manual
		PROBLEMS	POSSIBLE CAUSE	RECOMMENDED
		(SYMPTOMS)		COURSE OF ACTION
2.	Variable or “hunting arc.		a. Wrong size, worn and/or melted
			contact tip. - Replace if neces-
			sary.
			b. Worn work cable or poor work
			connection. - Replace if neces-
			sary.
			c. Loose electrode or work cable
			connections.
			d. Wrong polarity. - Make sure elec-
			trode polarity is correct for	If all recommended possible areas of
			process being used.	misadjustment have been checked
			e. Gas nozzle extended beyond gun	and the problem persists, Contact
				your local Lincoln Authorized
			tip or wire stickout too long while	Field Service Facility.
			welding.
			f. Poor gas shielding on processes
			requiring gas. - Check gas flow
			and mixture.
3.	Poor arc striking with sticking or		a. Improper procedures or tech-
“blast-offs”, weld porosity, narrow			niques. - See “Gas Metal Arc
and ropy looking bead, or electrode			Welding Guide” (GS-100).
stubbing into plate while welding.			b. Improper gas shielding - Clean
			gas nozzle. Make certain that gas
			diffuser is not empty or turned off.
			Make certain gas flow rate is
			proper.
			Remove gun liner and check rub-
			ber seal for any sign of deteriora-
			tion or damage. Be sure set
			screw in connector block is in
			place and tightened against the
			liner bushing.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

POWER FEED 11