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Lincoln Electric MAGNUM 250 User Manual

Lincoln Electric MAGNUM 250
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MAGNUM
®
PRO
250/350/450 AND 550
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September, 2010
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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.
!@56=D
/0/0/02?5/0
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.
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Lincoln Electric MAGNUM 250 Specifications

General IconGeneral
ProcessesMIG, Flux-Cored
Output Amperage Range30 - 250 A
Duty Cycle60% at 250 A
Wire Feed Speed Range50-700 IPM
Rated Output250 A at 30 V
Wire Diameter Range.023 - .045 in

Summary

Safety Information

Introduction to Safety

Initial safety message and reading manual importance.

Hazard Identification and Warnings

Covers Proposition 65, EMF, electric shock, fumes, fire, cylinder safety.

General Description

Product Overview and Compatibility

Details gun/cable assemblies and connector kit compatibility.

Model Specifications (250/350)

Lists specifications for PRO 250 and 350 models.

Model Specifications (450/550)

Lists specifications for PRO 450 and 550 models.

Installation

Connector Kit Installation

Instructions for installing various K466 connector kits.

Liner Installation and Trimming

Procedures for installing and trimming gun liners.

Contact Tip and Gas Nozzle Installation

How to install contact tips and gas nozzles.

Feeder Connections

Connecting guns to various wire feeders.

Operation

Electrodes and Equipment Selection

Information on suitable electrodes and equipment.

Performing a Weld

Step-by-step guide for performing a weld.

Avoiding Wire Feeding Problems

Tips for avoiding and resolving wire feeding issues.

Maintenance

Liner Maintenance and Repair

Instructions for liner removal, installation, and trimming.

Gun Tube and Nozzle Maintenance

Procedures for cleaning and maintaining gun tubes and nozzles.

Gun Cable Maintenance and Repair

Details on cleaning, repairing, and replacing gun cables.

Wire Feeder End Repair

Steps for repairing the wire feeder end of the cable.

Troubleshooting

Troubleshooting Guide Overview

How to use the troubleshooting guide.

Wire Feeding Issues

Common problems and remedies for wire feeding.

Arc Quality Problems

Diagnosing and fixing arc striking and porosity issues.

Tip Seizing Issues

Causes and solutions for tip seizing in the diffuser.

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