Miller Electric Bobcat 250 Engine Prestart Checks Kohler-Powered Units, Open top service door

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

5-3. Engine Prestart Checks (Kohler-Powered Units)

Full

Full

Gasoline

	1/2
0	1

H 0000

Check all fluids daily. Engine must be cold and on a level surface. Unit is shipped with 10W30 engine oil.

.Follow run-in procedure in en- gine manual.

NOTICE − This unit has a low oil pressure shutdown switch. Howev- er, some conditions may cause en- gine damage before the engine shuts down. Check oil level often and do not use the oil pressure shutdown system to monitor oil level.

Open top service door.

Fuel

To help prime the fuel system at ini- tial start-up, fill tank with fresh fuel (see maintenance label for specifi- cations). Always leave filler neck empty to allow room for expansion. Check fuel level on a cold engine before use each day.

Oil

.Do not exceed the ”Full” mark on the oil level dipstick. The fuel pump may operate errati- cally if crankcase is overfilled.

After fueling, check oil with unit on level surface. If oil is not up to full mark on dipstick, add oil (see main- tenance label).

.To improve cold weather starting:

Keep battery in good condition. Store battery in warm area.

Use correct grade oil for cold weather.

Close top service door.

803 754-C / 217 015-A

OM-4419 Page 19

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Contents 2007−05 OM-4419File Engine Drive Visit our website atFrom Miller to You Table of Contents 11-1 10-110-2 10-3HOT Parts can cause severe burns Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion Fumes and Gases can be hazardousBuildup of GAS can injure or kill ARC Rays can burn eyes and skinCompressed Air Hazards Engine HazardsFalling Unit can cause injury Welding Wire can cause injuryHOT Parts can cause burns and injury Fire or Explosion hazardRadiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationIndique des instructions spécifiques Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux DES Organes Mobiles peuvent pro voquer des blessures LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peu Risque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures ’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessuresEn ce qui concerne les implants médicaux Proposition californienne 65 AvertissementsPrincipales normes de sécurité Information EMF− Definitions − SpecificationsSymbol Definitions Weld, Power, and Engine SpecificationsDimensions Dimensions, Weights, and Operating AnglesDimensions For Units With Optional Running Gear Robin-PoweredUnit 560 lb 254 kgFuel Consumption Kohler-Powered Units Fuel Consumption Robin-Powered UnitsVolt-Ampere Curves For CC/AC ModeFor CC/DC Mode For CV/DC Mode 100% Duty Cycle at 250 Amperes Generator Power CurveDuty Cycle Installing Welding Generator − InstallationOil Engine Prestart Checks Robin-Powered Units0000 Oil CheckOpen top service door Engine Prestart Checks Kohler-Powered Units+ − Installing Exhaust PipeConnecting Or Replacing the Battery Connecting The Battery Connect negative − cable lastWork Weld Output Terminal Connecting to Weld Output TerminalsTools Needed Correct Installation Stop engineSelecting Weld Cable Sizes Front Panel Controls − Operating the Welding GeneratorFrequently Loaded Cold Weather Engine OperationInfrequently LoadedTools Needed 3/4 Typical Stick Welding Connections And Control SettingsTypical Settings For 7018 1/8 in Electrode Work Clamp Electrode HolderBe sure to use the correct size weld cables see Section Typical MIG Welding Connections And SettingsSolid Wire Applications Fine Control, Weld Process switch Settings Quick connectorFine Control, Weld Process switch Settings Self-Shielded Flux Core Wire ApplicationsLines and may not suit all applications Cables see Section Typical Settings For 4043Aluminum On 1/8 in Material Work− Operating Auxiliary Equipment Generator Power ReceptaclesReceptacle Simultaneous Weld And PowerWiring Optional 240 Volt Plug Current Available in Amperes 240500 Routine Maintenance Robin-Powered Units100 200Maintenance Label Robin-Powered Units Stop engine. Disconnect negative − battery cable Servicing Air Cleaner Robin-Powered UnitsOverload Protection Robin-Powered Units Oil Drain Valve 2 ID x 7 in Hose Oil Filter Oil Fill Oil CheckFull Stop engine and let coolWeld/Power Speed Adjustment Adjusting Engine Speed Robin-Powered UnitsIdle Speed Adjustment Turn idle speed screw for fine adjustmentsMaterial 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 Up fuel Stop engine and let cool Oil Drain Valve2 ID x 7 in Hose Oil Filter Close valve and valve cap before adding oil FullTurn idle speed screw for fine ad- justments Adjusting Engine Speed Kohler-Powered UnitsServicing Optional Spark Arrestor Kohler-Powered Units Overload Protection Kohler-Powered UnitsTrouble Remedy − TroubleshootingWelding Troubleshooting Generator Power TroubleshootingCheck fuel level Engine TroubleshootingCheck receptacle wiring and connections Recommended Spare Parts − Parts ListSwitch S2, and throttle solenoid TS1 Recommended Spare PartsCircuit Diagram For Welding Generator − Electrical Diagrams228 460-A Electrically Bond Generator − Generator Power GuidelinesSelecting Equipment Grounding Generator To Truck Or Trailer FrameAmperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Use ground device as stated in electrical codesFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 / Volts = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible − Stick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when electrode touches work- piece Striking an Arc − Tapping Technique Electrode and Amperage Selection ChartStriking an Arc − Scratch Start Technique 10-30 9090 Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Positioning Electrode HolderElectrode Movement During Welding Conditions That Affect Weld Bead ShapeOr Less Butt JointsLap Joint Tee JointPossible Causes Corrective Actions Troubleshooting − PorosityTroubleshooting − Excessive Spatter Weld TestTroubleshooting − Excessive Penetration Troubleshooting − Incomplete FusionTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Holding And Positioning Welding Gun − MIG Welding Gmaw GuidelinesSlow Normal Fast Push Perpendicular DragShort Normal Long Gun Movement During Welding 15-9 Troubleshooting − Excessive Penetration 15-7 Troubleshooting − Excessive Spatter15-8 Troubleshooting − Porosity Improper joint preparation Lack Of Penetration − shallowFusion between weld metal Unsteady hand Support hand on solid surface or use two hands Fillet Common MIG Shielding GasesApplication Page Support ServiceYour distributor also gives Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact