Lincoln Electric LN-25 SVM179-B User Manual
Ln-25, Pro wire feeder, Svm179-b
LN-25
™
PRO WIRE FEEDER
SVM179-B
April, 2011
For use with machines having Code Numbers: 11387, 11388
11507, 11508
11620, 11621
11716, 11717
11746, 11747
SERVICE MANUAL
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Copyright © Lincoln Global Inc.
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
... and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT
WITHOUT
READING THIS MANUAL
AND THE SAFETY PRE-
CAUTIONS
CONTAINED
THROUGHOUT.
And, most
importantly, think before you act
and be careful.
RETURN TO MAIN MENU
Document Outline
- Master Table of Contents
- Safety
- Section A - Installation
- Section B - Operation
- Section C - Accessories
- Section D - Maintenance
- Section E - Theory of Operation
- Section F - Troubleshooting and Repair
- Symptoms
- The feeder does not power up - no display (Digital Models) - no cold feed.
- The wire feeder powers up but there is no welder output when the gun trigger is pulled. The shielding gas flows and the drive rolls turn. (Across the arc models)
- Inconsistent wire feeding or wire not feeding but the drive rolls are turning.
- Wire feed speed consistently operates at the wrong value. The speed changes when the control knob is adjusted.
- This wire feeds but cannot be controlled with the wire speed pot.
- Variable or “hunting” arc.
- When the trigger is pulled, the wirefeeds slowly. (Digital display models)
- The preset voltage does not match the power source voltage. (Digital display models)
- Poor arc starts with sticking or “Blast-offs”, weld porosity, narrow or ropy looking beads.
- No shielding gas.
- Section G - Electrical Diagrams