Hobart Welding Products OM-240 438B manual From Hobart to You, Protect Your Investment

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Hobart is registered to the ISO 9001:2000 Quality System Standard.

From Hobart to You

Thank you and congratulations on choosing Hobart. 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.

This Owner’s Manual is designed to help you get the most out of your Hobart 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 Hobart 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.

Hobart Welders manufactures a full line of welders and welding related equipment.

For information on other quality Hobart products, contact your local Hobart distributor to receive the latest full line catalog or individual specification sheets.

To locate your nearest distributor or service agency call 1-877-Hobart1 or visit our website at www.HobartWelders.com.

For Technical Help call 1-800-332-3281.

Hob_Thank 2005−06

Working as hard as you do − every power source from Hobart is backed by the best warranty in the business.

Protect Your Investment!

Register your product at:

HobartWelders.com

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Contents Description OM-240 438BProcesses From Hobart to You Protect Your InvestmentTable of Contents 10-3 10-110-2 11-1Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can burnARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosionEngine Hazards Hydraulic HazardsHydraulic Fluid can injure or kill Use only genuine replacement parts from the manufacturerCompressed Air Hazards Compressed AIR Equipment can injure or killFalling Equipment can injure Welding Wire can injureFire or Explosion hazard Overheating can damage motorsRadiation can cause interference Principal Safety Standards EMF InformationCalifornia Proposition 65 Warnings ARC Welding can cause interferenceUN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiquesLE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peu- vent être dangereux LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peut provoquer des blessures Les Pièces Mobiles peuvent causer des blessuresLA Chaleur DU Moteur peut pro- voquer un incendie Les Pièces Mobiles peuvent causer des blessuresLire LES Instructions LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures Risque D’INCENDIE OULES Fils DE Soudage peuvent provoquer des blessures LE Surchauffement peut endommager le moteur électriqueLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsPrincipales normes de sécurité Informations relatives aux CEM En ce qui concerne les implants médicauxWeld, Power, and Engine Specifications − SpecificationsSymbol Definitions − DefinitionsWeight 562 lb 254 kg Dimensions, Weights, And Operating AnglesComplete Parts List is available at wwwHobartWelders.com Duty Cycle Dimensions For Units With Optional Running GearDimensions Welding AmperesFuel Consumption Subaru-Powered Units Fuel Consumption Kohler-Powered UnitsFor CC/DC Mode Generator Power CurveFor CC/AC Mode Volt-Ampere CurvesSerial Number And Rating Label Location − InstallationInstalling Welding Generator Grounding Generator To Truck Or Trailer Frame Oil Engine Prestart Checks Subaru-Powered UnitsOil Check To improve cold weather starting Engine Prestart Checks Kohler-Powered UnitsFull Connect negative − battery cable last Installing Exhaust PipeConnecting Or Replacing the Battery + − + −Tools Needed 3/4 Connecting To Weld Output TerminalsStop engine Failure to properly connect 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Selecting Weld Cable Sizes150 ft 200 ft 250 ft 100 150 200 250Front Panel Controls Engine Control Switch− Operating the Welding Generator Fine ControlLoaded Cold Weather Engine OperationInfrequently FrequentlyElectrode Typical Stick Welding Connections And Control SettingsStop engine − Operating Auxiliary Equipment Standard ReceptaclesCurrent Available in Amperes 240 Simultaneous Weld And PowerWiring Optional 240 Volt Plug Receptacle− Maintenance SUBARU-POWERED Units Maintenance Label Subaru-Powered Units100 Routine Maintenance Subaru-Powered UnitsStop engine before maintaining 200Stop engine and let cool Servicing Air Cleaner Subaru-Powered UnitsServicing Optional Spark Arrestor Subaru-Powered Units Oil Fill Oil Check Oil Drain Valve Oil FilterAdjusting Engine Speed Subaru-Powered Units Idle Speed AdjustmentFuse F1 See Section Overload Protection Subaru-Powered UnitsStop engine. Disconnect negative − battery cable − Maintenance − KOHLER-POWERED Units Maintenance Label Kohler-Powered UnitsRoutine Maintenance Kohler-Powered Units Hours Nl Weld Cables ~ Slip Rings Nl Brushes OM-240 438Servicing Air Cleaner Kohler−Powered Units Close valve and valve cap Stop engine and let cool Oil Drain Valve2 ID x 7 in Hose Oil Filter Full Before adding oil Running engineLoosen lock nut. Turn adjustment Adjusting Engine Speed Kohler-Powered UnitsAdjustment Nut Turn idle speed screw for fine ad- justmentsIf a fuse opens, it usually indi Overload Protection Kohler-Powered UnitsServicing Optional Spark Arrestor Kohler-Powered Units Generator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble RemedyCheck fuel level Engine TroubleshootingCheck receptacle wiring and connections Recommended Spare Parts − Parts ListControl switch S2, and throttle solenoid TS1 Recommended Spare PartsSOCKET/WRENCH Selection Table Standard Metric − Electrical Diagrams Circuit Diagram For Welding Generator240 424-A − Generator Power Guidelines Selecting EquipmentUse ground device as stated Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Electrical codesIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Tional, state, and local codesSelecting Extension Cord Use Shortest Cord Possible Electrode touches work Stick Welding Procedure− Stick Welding Smaw Guidelines Tools Needed Equipment Needed Piece Weld current can damageScratch Technique Electrode and Amperage Selection ChartStriking an Arc Tapping TechniquePositioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Groove Welds Fillet WeldsElectrode Angle Conditions That Affect Weld Bead ShapeElectrode Movement During Welding Tee Joint Butt JointsLap Joint To 3 51-76 mm .4 mm TroubleshootingWeld Test Possible Causes Corrective ActionsMetal remains Lack of Penetration Good PenetrationGood Penetration Excessive Penetration OM-240 438 OM-240 438 OM-240 438 Assistance ServiceSupport Contact your Distributor for Hobart Welding Products