Hobart Welding Products OM-240 438E manual Adjusting Engine Speed, Idle Speed Adjustment

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. A complete Parts List is available at www.HobartWelders.com

8-5. Adjusting Engine Speed

5

4

3

1

Top View

2200 − 2300 rpm

(36.6 − 38.3 Hz)

3675 − 3750 rpm

(61.3 − 62.5 Hz)

2

After tuning engine, check engine speeds with a tachometer (see table). If necessary, adjust speeds as follows:

Start engine and run until warm. Turn Fine Control to 10.

Remove rear panel and air cleaner to access idle speed adjustments. Remove top cover to access weld/ power speed adjustments.

Idle Speed Adjustment

Move Engine Control switch to Run/Idle position.

1Throttle Solenoid

2Mounting Screws

3Idle Speed Screw

Loosen mounting screws. Adjust solenoid position so engine runs at idle speed. If necessary, back out idle speed screw so solenoid can be moved to correct position. Tight- en mounting screws. Be sure sole- noid linkage works smoothly.

Turn idle speed screw for fine ad- justments.

Weld/Power Speed Adjustment

Move Engine Control switch to Run position.

4Weld/Power Speed Adjustment Nut

5Lock Nut

Loosen lock nut. Turn adjustment nut until engine runs at weld/power speed. Tighten lock nut.

! Stop engine.

Reinstall air cleaner, rear panel, and top cover.

Tools Needed:

1/4, 3/8 in.

244 033-A / 244 034-A

OM-240 438 Page 37

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Contents Description OM-240 438EProcesses Protect Your Investment From Hobart to YouTable of Contents 10-1 Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can burnBuildup of GAS can injure or kill Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionEngine Hazards Compressed Air Hazards Hydraulic HazardsHydraulic Equipment can injure or kill Hydraulic Fluid can injure or killFire or Explosion hazard Compressed AIR can injure or killOverheating can damage motors Falling Equipment can injureCalifornia Proposition 65 Warnings About Implanted Medical Devices Principal Safety StandardsEMF Information − Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer Indique des instructions spécifiquesLES Fumées ET LES GAZ peu- vent être dangereux LES Pièces Chaudes peuvent provoquer des brûluresLE Soudage peut provoquer un incendie ou une explosion LE Bruit peut affecter l’ouïeLes Pièces Mobiles peuvent causer des blessures ’EXPLOSION DE LA Batterie peut provoquer des blessuresLA Chaleur DU Moteur peut pro- voquer un incendie LES Étincelles À L’ÉCHAPPEMENT peuvent provoquer un incendieLire LES Instructions LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures Risque D’INCENDIE OULE Surchauffement peut endommager le moteur électrique LES Étincelles Projetées peuvent provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsUNE Remorque QUI Bascule peut provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformations relatives aux CEM Symbol Definitions − SpecificationsWeld, Power, and Engine Specifications − DefinitionsWeight 562 lb 254 kg Dimensions, Weights, And Operating AnglesDimensions Dimensions For Units With Optional Running GearDuty Cycle Duty CycleVolt-Ampere Curves For CC/AC ModeFor CC/DC Mode Fuel Consumption Generator Power CurveInstalling Welding Generator − InstallationSerial Number And Rating Label Location Movement Location / Airflow ClearanceGND/PE Grounding Generator To Truck Or Trailer FrameOil Engine Prestart ChecksConnecting Or Replacing the Battery Installing Exhaust PipeConnect negative − battery cable last + −Tools Needed 3/4 Connecting To Weld Output TerminalsStop engine Failure to properly connect 150 ft 200 ft 250 ft Selecting Weld Cable Sizes350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m 100 150 200 250Start Your Professional Welding Career Now − Operating the Welding Generator Engine Control SwitchFront Panel Controls Fine ControlInfrequently Cold Weather Engine OperationLoaded Frequently LoadedElectrode Typical Stick Welding Connections And Control SettingsStop engine Standard Receptacles − Operating Auxiliary EquipmentGfci Receptacle Option At least once a month, run engine atWiring Optional 240 Volt Plug Simultaneous Weld And PowerCurrent Available in Amperes 240 ReceptacleMaintenance Label − Maintenance100 Routine Maintenance200 500Servicing Air Cleaner Stop engine and let cool Changing Engine Oil, Oil Filter, and Fuel FilterClose valve and valve cap Before Adding Oil Running engineIdle Speed Adjustment Adjusting Engine SpeedWeld/Power Speed Adjustment Turn idle speed screw for fine ad- justmentsOverload Protection Stop engine. Disconnect negative − battery cableServicing Optional Spark Arrestor Fuse F1 See SectionWelding Troubleshooting − TroubleshootingGenerator Power Troubleshooting Trouble RemedyCheck receptacle wiring and connections Engine TroubleshootingErs SR2 and SR3 Check fuel levelControl switch S2, and throttle solenoid TS1 − Parts ListRecommended Spare Parts Recommended Spare PartsCircuit Diagram For Welding Generator − Electrical Diagrams240 424-B Selecting Equipment − Generator Power GuidelinesHow Much Power Does Equipment Require? Grounding When Supplying Building SystemsUse ground device as stated Electrical codesApproximate Power Requirements For Farm/Home Equipment Approximate Power Requirements For Industrial MotorsIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentHow Much Power Can Generator Supply? Power Required To Start MotorSingle-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible − Stick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when Electrode touches workStriking an Arc Electrode and Amperage Selection ChartScratch Technique Tapping TechniqueGood Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder End View Of Work Angle Side View Of Electrode Angle 10-30Electrode Movement During Welding Conditions That Affect Weld Bead ShapeElectrode Angle NormalLap Joint Groove Butt JointsTee Joint Or LessWeld Test TroubleshootingPossible Causes Corrective Actions Weld beadGood Penetration Excessive Penetration Lack of Penetration Good PenetrationMetal remains DirectionSOCKET/WRENCH Selection Table Standard Metric Assistance ServiceSupport Hobart Welding Products Contact your Distributor for