Hobart Welding Products OM-240 438B Adjusting Engine Speed Kohler-Powered Units, Adjustment Nut

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. A complete Parts List is available at wwwHobartWelders.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

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.
	4	Weld/Power Speed
		Adjustment Nut
	5	Lock Nut
3	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.

Top View

Tools Needed:

1/4, 3/8 in.

244 033-A / 244 034-A

OM-240 438 Page 42

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Contents Processes OM-240 438BDescription 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 électriquePrincipales normes de sécurité Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Informations relatives aux CEM En ce qui concerne les implants médicauxWeld, Power, and Engine Specifications − SpecificationsSymbol Definitions − DefinitionsComplete Parts List is available at wwwHobartWelders.com Dimensions, Weights, And Operating AnglesWeight 562 lb 254 kg 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 CurvesInstalling Welding Generator − InstallationSerial Number And Rating Label Location Grounding Generator To Truck Or Trailer Frame Oil Check Engine Prestart Checks Subaru-Powered UnitsOil Full Engine Prestart Checks Kohler-Powered UnitsTo improve cold weather starting Connect negative − battery cable last Installing Exhaust PipeConnecting Or Replacing the Battery + − + −Stop engine Failure to properly connect Connecting To Weld Output TerminalsTools Needed 3/4 350 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 FrequentlyStop engine Typical Stick Welding Connections And Control SettingsElectrode − 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 200Servicing Optional Spark Arrestor Subaru-Powered Units Servicing Air Cleaner Subaru-Powered UnitsStop engine and let cool Oil Fill Oil Check Oil Drain Valve Oil FilterAdjusting Engine Speed Subaru-Powered Units Idle Speed AdjustmentStop engine. Disconnect negative − battery cable Overload Protection Subaru-Powered UnitsFuse F1 See Section − 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- justmentsServicing Optional Spark Arrestor Kohler-Powered Units Overload Protection Kohler-Powered UnitsIf a fuse opens, it usually indi Generator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble RemedyCheck receptacle wiring and connections Engine TroubleshootingCheck fuel level 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 Movement During Welding Conditions That Affect Weld Bead ShapeElectrode Angle Lap Joint Butt JointsTee Joint To 3 51-76 mm .4 mm TroubleshootingWeld Test Possible Causes Corrective ActionsGood Penetration Excessive Penetration Lack of Penetration Good PenetrationMetal remains OM-240 438 OM-240 438 OM-240 438 Support ServiceAssistance Contact your Distributor for Hobart Welding Products