Lincoln Electric IM10078 specifications PRObLEMS, POSSIbLE CAuSE

E-3	TROubLEShOOTING	E-3
	Observe all Safety Guidelines detailed throughout this manual

PRObLEMS

(SYMPTOMS)

POSSIbLE

CAuSE

RECOMMENDED

COuRSE OF ACTION

Inconsistent wire feeding or wire not	1. The gun cable is kinked and/or	1.	Keep the gun cable as straight as
feeding but drive rolls turning.	twisted.		possible. Avoid sharp corners or
			bends in the cable.
	2. The wire is jammed in the gun and	2.	Remove the gun from the wire
	cable.		feeder and pull the jammed wire
			out of the gun and cable.
		3.	Blow dirt out of the liner with low
			pressure (40psi or less). Replace
			the liner if worn.
		4.	Use only clean electrode. Use
			quality electrode, like L-50 or L-56
			from Lincoln Electric.
		5.	Replace the contact tip.
		6.	Verify the proper parts are
			installed.
		7.	Adjust the tension arm per the
			Instruction Manual. Most elec-
			trodes feed well at a tension arm
			setting of "3".
		8.	Verify the spool of wire moves
			with minimal effort.
		9.	Replace the drive rolls if worn or
			filled with dirt.
Wire feed speed consistently oper-	1. The wrong gear is installed in the	1.	Install the proper pinion gear in
ates at the wrong value. The speed	wire drive.		the wire drive.
changes when the wire feed speed	2. The brushes on the motor are	2. Inspect and replace the motor
knob is adjusted.	worn.		brushes.
The wire feed speed stuck at 200-	1. The tachometer is connected	1.	Verify all of the tachometer leads
300 in/min and there is no change	improperly.		are properly connected.
when the wire feed speed knob is	2. The tachometer has failed.	2.	Replace the motor and tachome-
adjusted.			ter assembly.

CAuTION

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

RED-D-ARC LN-25™ PRO EXTREME