Miller Electric Bobcat 250 manual Adjusting Engine Speed Kohler-Powered Units

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

9-5. Adjusting Engine Speed (Kohler-Powered Units)

2200 − 2300 rpm

(36.6 − 38.3 Hz)

3675 − 3750 rpm

(61.3 − 62.5 Hz)

1

5

4	2

3

Top View

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, end panel, and top cover.

Tools Needed:

1/4, 3/8 in

803 752 / 801 209-A

OM-4419 Page 41

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Contents File Engine Drive OM-4419Visit our website at 2007−05From Miller to You Table of Contents 10-2 10-110-3 11-1Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can cause severe burnsBuildup of GAS can injure or kill Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionCompressed Air Hazards Engine HazardsHOT Parts can cause burns and injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injuryCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information Radiation can cause interference− Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer Indique des instructions spécifiquesDES Pièces Chaudes peuvent provoquer des brûlures graves LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut affecter l’ouïe ’EXPLOSION DE LA Batterie peuDES Organes Mobiles peuvent pro voquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie ’AIR Comprimé peut provoquer des blessuresRisque D’INCENDIE OU D’EXPLO- Sion DES Organes Mobiles peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueLES Fils DE Soudage peuvent provoquer des blessures ’EMPLOI Excessif peutPrincipales normes de sécurité Proposition californienne 65 AvertissementsInformation EMF En ce qui concerne les implants médicauxSymbol Definitions − SpecificationsWeld, Power, and Engine Specifications − DefinitionsDimensions For Units With Optional Running Gear Dimensions, Weights, and Operating AnglesRobin-PoweredUnit 560 lb 254 kg DimensionsFuel Consumption Kohler-Powered Units Fuel Consumption Robin-Powered UnitsFor CC/AC Mode For CC/DC Mode For CV/DC ModeVolt-Ampere Curves Generator Power Curve Duty Cycle100% Duty Cycle at 250 Amperes Installing Welding Generator − Installation0000 Engine Prestart Checks Robin-Powered UnitsOil Check OilOpen top service door Engine Prestart Checks Kohler-Powered UnitsConnecting Or Replacing the Battery Installing Exhaust PipeConnecting The Battery Connect negative − cable last + −Tools Needed Correct Installation Connecting to Weld Output TerminalsStop engine Work Weld Output TerminalSelecting Weld Cable Sizes Front Panel Controls − Operating the Welding GeneratorInfrequently Cold Weather Engine OperationLoaded Frequently LoadedTypical Settings For 7018 1/8 in Electrode Typical Stick Welding Connections And Control SettingsWork Clamp Electrode Holder Tools Needed 3/4Solid Wire Applications Typical MIG Welding Connections And SettingsFine Control, Weld Process switch Settings Quick connector Be sure to use the correct size weld cables see SectionFine Control, Weld Process switch Settings Self-Shielded Flux Core Wire ApplicationsAluminum On 1/8 in Material Typical Settings For 4043Work Lines and may not suit all applications Cables see Section− Operating Auxiliary Equipment Generator Power ReceptaclesWiring Optional 240 Volt Plug Simultaneous Weld And PowerCurrent Available in Amperes 240 Receptacle100 Routine Maintenance Robin-Powered Units200 500Maintenance Label Robin-Powered Units Servicing Air Cleaner Robin-Powered Units Overload Protection Robin-Powered UnitsStop engine. Disconnect negative − battery cable Full Oil Fill Oil CheckStop engine and let cool Oil Drain Valve 2 ID x 7 in Hose Oil FilterIdle Speed Adjustment Adjusting Engine Speed Robin-Powered UnitsTurn idle speed screw for fine adjustments Weld/Power Speed AdjustmentMaterial Thickness Reference Chart Servicing Optional Spark Arrestor Robin-Powered UnitsHours Nl Weld Cables ~ Slip Rings Nl Brushes OM-4419 Routine Maintenance Kohler-Powered UnitsMaintenance Label Kohler-Powered Units Servicing Air Cleaner Kohler−Powered Units 2 ID x 7 in Hose Oil Filter Stop engine and let cool Oil Drain ValveClose valve and valve cap before adding oil Full Up fuelTurn idle speed screw for fine ad- justments Adjusting Engine Speed Kohler-Powered UnitsServicing Optional Spark Arrestor Kohler-Powered Units Overload Protection Kohler-Powered UnitsWelding Troubleshooting − TroubleshootingGenerator Power Troubleshooting Trouble RemedyEngine Troubleshooting Check receptacle wiring and connectionsCheck fuel level Switch S2, and throttle solenoid TS1 − Parts ListRecommended Spare Parts Recommended Spare PartsCircuit Diagram For Welding Generator − Electrical Diagrams228 460-A Selecting Equipment − Generator Power GuidelinesGrounding Generator To Truck Or Trailer Frame Electrically Bond GeneratorHow Much Power Does Equipment Require? Grounding When Supplying Building SystemsUse ground device as stated in electrical codes Amperes x Volts = WattsApproximate 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 Procedure Weld current starts when electrode touches work- piece− Stick Welding Smaw Guidelines Electrode and Amperage Selection Chart Striking an Arc − Scratch Start TechniqueStriking an Arc − Tapping Technique Good Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder 10-30 9090Electrode Movement During Welding Conditions That Affect Weld Bead ShapeLap Joint Butt JointsTee Joint Or LessTroubleshooting − Excessive Spatter Troubleshooting − PorosityWeld Test Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Excessive Penetration Troubleshooting − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Holding And Positioning Welding Gun − MIG Welding Gmaw GuidelinesPush Perpendicular Drag Short Normal LongSlow Normal Fast Gun Movement During Welding 15-7 Troubleshooting − Excessive Spatter 15-8 Troubleshooting − Porosity15-9 Troubleshooting − Excessive Penetration Lack Of Penetration − shallow Fusion between weld metalImproper joint preparation Unsteady hand Support hand on solid surface or use two hands Common MIG Shielding Gases ApplicationFillet Page Service Your distributor also givesSupport Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s