Lincoln Electric POWER MIG SVM157-A User Manual
Power mig, Service manual svm157-a
POWER MIG
™
200
SERVICE MANUAL
SVM157-A
October 2001
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 READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before you
act and be careful.
For use with machines having Code Numbers:
10564
10584
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• World's Leader in Welding and Cutting Products •
• 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
Copyright © 2001 Lincoln Global Inc.
Document Outline
- Master Table of Contents
- Safety Section
- Section A - Installation
- Section B - Operation
- Section C - Accessories
- Section D - Maintenance
- Section E - Theory of Operation
- Section F - Troubleshooting & Repair
- Symptoms
- Major physical or electrical damage is evident.
- The machine is dead-no open circuit voltage and no wire feed when the gun trigger is activated. The cooling fan is not...
- There is no open circuit voltage or wire feed when the gun trigger is activated. The cooling fan is...
- When the gun trigger is activated and the wire feeds normally, but there is no open circuit voltage.
- Output voltage and wire feed speed is present when the gun trigger is NOT activated.
- The machines output is low. Welds are “cold”. The weld beads are rounded or “humped” demonstrating...
- The output voltage is continuous when the gun trigger is NOT activated. The wire feed functions normally.
- There is no gas flow when the gun trigger is activated . The wire feeds and the arc voltage is present.
- The machine stops feeding wire while welding. When the gun trigger is released and pulled again, the wire feed starts.
- Rough wire feeding or the wire will not feed but the drive rolls are turning.
- No control of wire feed speed. Other machine functions are normal.
- There is no wire feed when the gun trigger is activated. Normal open circuit weld voltage is present and the gas solenoid...
- Poor arc striking with electrode sticking or blasting off.
- The arc is unstable and or “hunting”
- The weld bead is narrow or ropy. May have porosity with the electrode stubbing into the plate.
- The contact tip seizes in the gas diffuser.
- Section G - Electrical Diagrams