Making Engine Speed Adjustments | Miller Electric 250 instruction

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

C. Making Engine Speed Adjustments

	2375−2450 rpm
Idle	39.6−40.8 Hz
Idle
	3675−3750 rpm
Weld/Power 61.3−62.5 Hz

Be sure throttle link is parallel with throttle lever.

67

1

2

4

5

Do not twist

3 solenoid boot while adjusting engine speed.

.Before adjusting engine speed, verify

throttle solenoid is installed properly (see Section B on previous page).

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

Start engine and run until warm. Turn V/A control to max.

Adjusting Idle Speed

Turn Engine Control switch to Run/Idle position.

1Throttle Solenoid

2Idle Speed Jam Nut

3Plunger

4Throttle Link

5Throttle Lever

Loosen jam nut. While holding throttle link with a 3/8 in wrench, turn plunger clock- wise to increase idle speed or counter- clockwise to decrease idle speed.

.After adjusting idle speed, verify the

throttle link is parallel with the throttle lever. If necessary, loosen the idle speed jam nut and reposition the throttle link.

.Do not twist solenoid boot while ad- justing engine speed.

Tighten jam nut.

Adjusting Weld/Power Speed

Start engine and run until warm. Turn V/A control to max.

6Weld Speed Jam Nut

7Adjustment Screw

Turn Engine Control switch to Run posi- tion. Loosen nut and turn screw counter- clockwise to increase speed. Turn screw clockwise to decrease speed. Tighten nut.

Tools Needed:

3/8, 7/16 in 10, 14 mm

Ref. 804 250-A / 801 963

OM-217 455 Page 37

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Miller Electric 250 manual Making Engine Speed Adjustments, Adjusting Idle Speed, Adjusting Weld/Power Speed

Contents

File Engine Drive OM-217 455HVisit our website at 2007−05−21 From Miller to You Table of Contents 13-3 13-213-4 13-5 Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can cause severe burns Buildup of GAS can injure or kill Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosion Compressed Air Hazards Engine Hazards HOT Parts can cause burns and injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injury California 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 spécifiques LE 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 DES Organes Mobiles peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueLES Fils DE Soudage peuvent provoquer des blessures ’EMPLOI Excessif peut Principales normes de sécurité Proposition californienne 65 AvertissementsInformation EMF En ce qui concerne les implants médicaux Symbol Definitions − SpecificationsWeld, Power, and Engine Specifications − Definitions Dimensions Dimensions, Weights, and Operating AnglesDimensions For Units With Optional Running Gear Installing Welding Generator − InstallationVehicle frame. Always connect a ground wire Mounting Connecting the Battery Installing Exhaust Pipe+ − Stop engine and let cool Overview And Engine Prestart Checks Starting engine for the first time Engine Left Side Engine Right SideRun-in period first 100 hours Daily pre-start checks Correct Installation Connecting to Weld Output TerminalsWork Weld Output Terminal Tools Needed Do not place Selecting Weld Cable Sizes Place switch in Run position to operate most MIG equipment Engine Control Switches− Operating the Welding Generator Do not use glow plugs longer than 20 seconds Weld Output Controls Typical Settings For 7018 1/8 Electrode Typical Stick Welding Connections And Control SettingsStop engine Work Clamp Electrode Holder Set Weld Process Selector switch to Wire + Dcep position Typical MIG Welding Connections And SettingsSet Weld Process Selector switch to Wire + position Set Weld Process Selector switch to Wire − position Dcen Tools Needed 3/4 Work Not Used To Work Left Side View − Operating Auxiliary Equipment Generator Power ReceptaclesAt least once a month, run engine at To verify Gfci is working properly Simultaneous Weld And Power Determining Battery Charging Current − Operating Optional Battery ChargerBattery Charge Controls Battery Charge Cable Connections Minutes Battery Charging Procedure Start Your Professional Welding Career Now Routine Maintenance − Maintenance and Troubleshooting Stop engine and let cool Oil And Fuel Maintenance Label And Engine Maintenance Activities 804 197-A / Ref 803 111-A / 227 Ment is not covered by the warranty Cleaner or with dirty element. EngineAir cleaner primary element can Damage when determining whether Adjusting Fuel Solenoid Position Adjusting Engine SpeedStop screw is factory-set and should not be adjusted Checking Fuel Solenoid Checking Throttle Solenoid Adjusting Throttle Solenoid16 mm Check for non-binding Adjusting Weld/Power Speed Making Engine Speed AdjustmentsAdjusting Idle Speed Component Panel Stop engine Overload ProtectionFuse F1 Supplementary Protector CB8 Generator Power Troubleshooting TablesWelding Trouble Remedy Engine Maintenance Display Action Recommended Spare Parts − Parts ListRecommended Spare Parts Current transformer CT1, and throttle solenoid TS1 Circuit Diagram For Welding Generator − Electrical Diagrams 228 719-B OM-217 455 231 607-B Run-In And Wetstacking − RUN-IN and Wetstacking Fuel Consumption Curves − Performance DataUS Gal./Hr Idle Duty Cycle Generator Power CurveVolts AC Amperes At 120 Volts AC Amps Stick Mode Volt-Ampere CurvesDC Amps CC/AC Stick Mode AC Volts DC Amps MIG Mode Volt-Ampere Curve Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment How Much Power Does Equipment Require? Grounding When Supplying Building SystemsUse ground device as stated in electrical codes Amperes x Volts = Watts Approximate 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 Watts Contractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor Equipment How Much Power Can Generator Supply? Power Required To Start MotorSingle-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 / Volts = Starting Amperage Typical 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 Good Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder 10-30 9090 End View of Work Angle Electrode Movement During Welding Conditions That Affect Weld Bead Shape Lap Joint Butt JointsTee Joint 16 in 30 1.6 mm Tack Welds Troubleshooting − Excessive Spatter Troubleshooting − PorosityWeld Test Possible Causes Corrective Actions Troubleshooting − Excessive Penetration Troubleshooting − Incomplete FusionTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Work like a Pro Support ServiceYour distributor also gives 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