Lincoln Electric SVM135-B service manual Welding Problems

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F-19 TROUBLESHOOTING AND REPAIR F-19

POWER FEED

Observe all Safety Guidelines detailed throughout this manual.

PROBLEMS	POSSIBLE AREAS OF		RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)		COURSE OF ACTION
		WELDING PROBLEMS
The gun tip seizes in diffuser.	1.	The tip may be overheating due	1. Contact the Lincoln Electric
		to prolonged or excessive high	Service Department, 216-383-
		current and /or duty cycle. Do	2531 or 1-800-833-9353
		not exceed the current and duty	(WELD).
		cycle rating of the gun.
	2.	A light application of high tem-
		perature antiseize lubricant
		(such as Graphite Grease) may
		be applied to tip threads.
Poor arc striking with sticking or	1.	Make sure the weld procedures	1. Contact the Lincoln Electric
“blast-offs”. The weld bead may		are correct for the process being	Service Department, 216-383-
be narrow and ropy with weld		used. Check gas, wire feed,	2531 or 1-800-833-9353
porosity.		speed and arc voltage.	(WELD).
	2.	Remove the gun liner and check
		the rubber seal for any sign of
		deterioration or damage. Be
		sure the set screw in the con-
		nector block is in place and
		tightened against the liner
		bushing.
	3.	Check the welding cables for
		loose or faulty connections.
The arc is variable and/or hunting.	1.	Check the contact tip. It may be	1. Contact the Lincoln Electric
The power source, Control Box		worn or the wrong size for the	Service Department, 216-383-
and drive units seem to be operat-		electrode wire being used.	2531 or 1-800-833-9353
ing properly.			(WELD).
	2.	Check for loose or faulty weld-
		ing cables and connections.
	3.	Make sure the weld procedures
		are correct for the process being
		used. Check gas, wire feed
		speed and arc voltage.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

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POWER WAVE 455/POWER FEED 10