Lincoln Electric SVM189-B service manual Maintenance Section

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-8 TROUBLESHOOTING & REPAIR F-8

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS		POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)		MISADJUSTMENT(S)	COURSE OF ACTION
		SPOOL GUN PROBLEMS
No wire feed occurs when Spool	1.	Machine is switched off or	1. Switch on or plug in machine.
Gun trigger is pulled.		unplugged.	2. Install full spool of specified
	2.	Spool gun is out of wire	wire.
	3.	Contact tip burnback.	3. Replace contact tip.
	4.	Fully or partially blocked gun	4. Replace and clean or replace
		tube liner.	gun tube liner. ( See
	5.	Bird nest.	Maintenance Section)
	6.	Machine’s toggle selector	5. Cut out birds nest, reload
			wire, and check for proper
		switch is not set to spool gun
			wire alignment and wire’s
		mode.
			mechanical resistance.
	7.	Defective trigger. (contacts	6. Flip switch to proper
		open)
			operating position.
	8.	Defective trigger circuit in gun.	7. Replace trigger. ( See
	9.	Damaged spool gun motor.	Maintenance Section).
	10. No motor voltage or current		8. Disconnect gun from machine
			and check trigger for
		from machine.
			continuity.
	11. Contact tip size too small for		9. Contact LASF for possible
		wire diameter used.
			motor replacement.
			10. See Troubleshooting section
			in welding machine’s
			instruction manual.
			11. Replace contact tip with one
			that is the right size.
Sluggish wire feed when the	1.	Drive roll is worn or galled with	1. Clean drive roll of all
Spool Gun trigger is pulled.		aluminum.	aluminum or replace drive
			roll.
	2.	Machine’s wire feed speed	2. Increase wire feed speed.
		setting is too low.
	3.	Wire is obstructed somewhere	3. Check for obstructions:
			remove any wire shavings;
		along the wire feed path in the
			remove kinked wire; remove
		gun.
			and clean or replace gun tube
	4.	Low motor voltage.	liner ( See Maintenance
			Section).
			4. See Troubleshooting section
			in welding machine’s
			instruction manual.

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 1-888-935-3877.

COMPACT WIRE WELDERS