Miller Electric Metro 250D manual Adjusting Engine Speed, Idle Speed Adjustment

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7.6Adjusting Engine Speed

After tuning engine, check engine speeds with a tachometer (see table for no load speeds). If necessary, adjust speeds as follows:

Ref. ST-159 215-E

Start engine and run until warm.

Idle Speed Adjustment

Turn Engine Control switch to Run/ Idle position.

1Idle Speed Lock Nut

2Idle Speed Screw

Loosen nut. Turn screw until engine runs at idle speed. Tighten nut.

Weld/Power Speed Adjustment

Turn Engine Control switch to Run position.

3Weld/Power Speed Lock Nut

4Weld/Power Speed Screw Loosen nut and back out screw.

5Linkage Lock Nut

6Linkage

Loosen nut and turn linkage until engine runs 50 rpm above specified weld/power speed. Tighten linkage lock nut.

Turn weld/power speed screw until engine runs at weld/power speed. Tighten nut.

YStop engine. Shutdown Adjustment

.Shutdown mechanism normally

does not require adjustment un- less tampered with.

7Shutdown Linkage Lock Nuts

8Shutdown Linkage Rod

Loosen nuts. Turn rod until measurement between swivels is 3 in (76 mm). Tighten nuts.

9Shutdown Lever Lock Nut

10Shutdown Lever Adjust Nut

11Shutdown Lever Screw

12Shutdown Lever

Loosen nuts. Back screw out and away from lever. Turn lever clockwise until lever hits internal stop. Tighten adjust nut until screw hits lever, then tighten adjust nut another 1-1/2 turns to bring lever off internal stop. Tighten nuts.

3700 rpm

2200 rpm

7 8 7

3 in (76 mm)

12

11 10

9

5

6

4

3

		Leave no
1	2	space
1	2	between

nuts.

Tools Needed:

5/16, 3/8, 7/16 in, 10 mm

28

OM-402

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Contents Description OM-402BProcesses From Miller to You Table of Contents Metro 250DPage Arc Welding Hazards Safety Precautions − Read Before UsingSymbol Usage Engine Hazards Battery Explosion can Blind Moving Parts can cause injuryEngine Exhaust Gases can kill Engine Heat can cause firePrincipal Safety Standards EMF InformationRadiation can cause interference ARC Welding can cause interferenceSignification des symboles Consignes de sécurité − lire avant utilisationUN Choc Électrique peut tuer LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in- cendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Pièces Chaudes peuvent provoquer des brûlures graves LE Bruit peut affecter l’ouïeDES Organes Mobiles peuvent provoquer des blessures ’EXPLOSION DE LA Batterie peutLA Chaleur DU Moteur peut pro- voquer un incendie LA Chute DE L’APPAREIL peut blesserPrincipales normes de sécurité Information sur les champs électromagnétiquesÉlectrostatiques peuvent endommager les circuits imprimés UNE Remorque QUI Bascule peut entraîner des blessuresSymbols and Definitions DefinitionsGeneral Precautionary Label Battery Charging Label Fan and Moving Parts LabelHot Muffler Label Diesel Fuel Label− 50 h Std Falling Equipment LabelActivation Tag Do Not Use Ether Label Manufacturer’s Rating LabelSpecifications Weld, Power, and Engine SpecificationsDimensions, Weights, and Operating Angles Volt-Ampere CurveFuel Consumption Duty Cycle and OverheatingInstallation AC Auxiliary Power CurveInstalling Welding Generator Location GroundingConnecting Battery and Installing Exhaust Pipe Engine Prestart ChecksStop engine Connect negative − cable lastConnecting to Weld Output Terminals Selecting Weld Cable Sizes100 ft 30 m or Less 10 − 60% 60 − 100% Duty 10 − 100% Duty CycleSocket Information Remote 14 Receptacle RC1 InformationRef. ST-158 Using Idle Lock Switch Operating the Welding GeneratorFront Panel Controls PlugRemote Amperage and Contactor Control Auxiliary Power Receptacles Operating Auxiliary EquipmentMaintenance & Troubleshooting 100 Hrs Maintenance Changing Engine Oil and Oil Filter Servicing Air Cleaner To Clean air filterDo not clean housing with air hose Changing Fuel FiltersWeld/Power Speed Adjustment Adjusting Engine SpeedIdle Speed Adjustment Weld And Auxiliary Power Circuits Remote Control CircuitOverload Protection Engine Control CircuitWelding Troubleshooting Stop engine and let cool. Reinstall cleanout plugServicing Optional Spark Arrestor Trouble RemedyAuxiliary Power Troubleshooting Engine TroubleshootingUle OM-402 Electrical Diagram Circuit Diagram for Welding GeneratorSC-181 Heavy loading during first Run-In ProcedureWetstacking Run-In Procedure Using Load Bank Load BankRun-In Procedure Using Resistance Grid Grounding Generator to Truck or Trailer Frame Auxiliary Power GuidelinesSelecting Equipment Amperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Approximate Power Requirements for Industrial Motors Approximate Power Requirements for Farm/Home EquipmentIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements for Contractor Equipment Contractor Rating Starting Watts Running WattsPower Required to Start Motor How Much Power Can Generator Supply?Single-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 = Starting Amperage VoltsTypical Connections to Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Current Load Watts AmperesParts List Main AssemblyST-801 488-A 11.1 PC6CB9 Panel, Front w/Components .1 Item 11.2 CB5Generator .1 Item Control Box w/Components .1 Item Diode BoardOM-402 Page OM-402 Page Options and Accessories Metro 250DCall Miller for your local Miller distributor Owner’s Record Miller Electric Mfg. Co