Miller Electric D-74D manual From Miller to You

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Miller is the first welding equipment manufacturer in the U.S.A. to be registered to the ISO 9001:2000 Quality System Standard.

From Miller to You

Thank you and congratulations on choosing Miller. Now you can get the job done and get it done right. We know you don’t have time to do it any other way.

That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality. Like you, his customers couldn’t afford anything less. Miller products had to be more than the best they could be. They had to be the best you could buy.

Today, the people that build and sell Miller products continue the tradition. They’re just as committed to providing equipment and service that meets the high standards of quality and value established in 1929.

This Owner’s Manual is designed to help you get the most out of your Miller products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite.

We’ve made installation and operation quick and easy. With Miller you can count on years of reliable service with proper maintenance. And if for some reason the unit needs repair, there’s a Troubleshooting section that will help you figure out what the problem is. The parts list will then help you to decide the exact part you may need to fix the problem. Warranty and service information for your particular model are also provided.

Miller Electric manufactures a full line

of welders and welding related equipment. For information on other quality Miller

products, contact your local Miller distributor to receive the latest full line catalog or individual specification sheets. To locate your nearest distributor or service agency call 1-800-4-A-Miller, or visit us at www.MillerWelds.com on the web.

Mil_Thank 4/05

Working as hard as you do

−every power source from Miller is backed by the most hassle-free warranty in the business.

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Contents Description OM-1500-6 206 805HProcesses File MIG GmawFrom Miller to You Table of Contents Standards Decwire6/05Directives Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer unIncendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures graves’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaquesKeep your head out of the fumes Disconnect input plug or power before working on machineDrive rolls can injure fingers Symbols And Definitions Rating Label For CE ProductsRating SpecificationsSite Selection Equipment Connection Diagrams Rear Panel Connections And Rotating Drive Assembly Pin Plug Information Wire Type, Size, And Feed Speed Capability TableMotor Speed Wire Type Wire Size Feed Speed Capability Gun Recommendation TableInstalling And Threading Welding Wire Right Side Motor Control Board PC1 Left Side Motor PC101 Setting Internal DIP SwitchesCurrent Detect Override OFF Factory Default S1-1 And S1-2 Automatic Run-In OFF S1-1 And S1-2Optional Equipment DIP Switch Settings PC60Power Switch Power SwitchLeft/Right Select Switch Jog/PurgeVoltage Control And Digital Meters Trigger Hold SwitchTrigger Hold Switches Months Routine MaintenanceDisconnect power before maintaining Diagnostics Wire feeds, shielding gas flows, but TroubleshootingDisconnect power before troubleshooting Trouble RemedyOM-1500-6 − Electrical Diagram 204 716-B Main Assembly 21 −2Part Description Quantity Control Box Harness Connectors/Receptacles 130Drive Assembly, Wire Drive Assembly, Wire -1Item203 Roll Drive Drive Roll And Wire Guide Kits Fraction MetricKit Roll Wire Size Roll Drive KitPage Page Support ServiceYour distributor also gives For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s