Cold Weather Engine Operation | Hobart Welding Products OM-240 438E

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

6-2. Cold Weather Engine Operation

1 Engine Control Switch

1	Infrequently
	Loaded

Frequently

Loaded

Ref. 240 947

Carburetor Icing

Carburetor icing causes the unit to drop below the normal idle speed and then stall. This condition occurs when the temperature is near freezing and the rela- tive humidity is high. Ice forms on the throttle plate and inner bore of the carbu- retor. The engine typically restarts without problems but soon stalls again.

STreat gasoline with a fuel de−icer product (isopropyl alcohol).

SPlace the Engine Control switch in the Run position.

SRun engine only when expecting to frequently load it.

Breather Icing

Oil breather/pulse line icing occurs in severe cold (continuously below 0_F). Moisture accumulates in the oil from piston ring blow−by if the engine is exten- sively idled. This may cause vacuum line freezing, oil breather tube freezing or ice in the carburetor. All of these cause operating problems. Due to ice in the lines, the engine may not restart until it is warmed to above freezing.

SLoad engine and reduce idle times to prevent engine shutdowns.

SUse an electric fuel pump to avoid pulse line freezing.

SInstall engine cold−weather kit.

Kohler (1-800-544-2444) offers a kit for cold weather operation. The user can install this kit. The kit pulls heated air from the muffler surface into the carbure- tor and shuts the cold air off. This increases engine temperature during opera- tion in both idle and high speed.

.When the ambient temperatures become warmer (above 45_F) the air flow will have to be returned to normal.

Notes

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OM-240 438 Page 29

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Hobart Welding Products OM-240 438E manual Cold Weather Engine Operation, Infrequently, Frequently Loaded

Contents

OM-240 438E ProcessesDescription Protect Your Investment From Hobart to You Table of Contents 10-1 Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can burn 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 Engine Hazards Compressed Air Hazards Hydraulic HazardsHydraulic Equipment can injure or kill Hydraulic Fluid can injure or kill Fire or Explosion hazard Compressed AIR can injure or killOverheating can damage motors Falling Equipment can injure California Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Implanted Medical Devices − Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer Indique des instructions spécifiques LES Fumées ET LES GAZ peu- vent être dangereux LES Pièces Chaudes peuvent provoquer des brûluresLE Soudage peut provoquer un incendie ou une explosion LE Bruit peut affecter l’ouïe Les Pièces Mobiles peuvent causer des blessures ’EXPLOSION DE LA Batterie peut provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie LES Étincelles À L’ÉCHAPPEMENT peuvent provoquer un incendie Lire LES Instructions LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures Risque D’INCENDIE OULE Surchauffement peut endommager le moteur électrique LES Étincelles Projetées peuvent provoquer des blessures Proposition californienne 65 Avertissements UNE Remorque QUI Bascule peut provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Principales normes de sécurité Informations relatives aux CEMEn ce qui concerne les implants médicaux Symbol Definitions − SpecificationsWeld, Power, and Engine Specifications − Definitions Weight 562 lb 254 kg Dimensions, Weights, And Operating Angles Dimensions Dimensions For Units With Optional Running GearDuty Cycle Duty Cycle For CC/AC Mode For CC/DC ModeVolt-Ampere Curves Fuel Consumption Generator Power Curve Installing Welding Generator − InstallationSerial Number And Rating Label Location Movement Location / Airflow Clearance GND/PE Grounding Generator To Truck Or Trailer Frame Oil Engine Prestart Checks Connecting Or Replacing the Battery Installing Exhaust PipeConnect negative − battery cable last + − Connecting To Weld Output Terminals Stop engine Failure to properly connectTools Needed 3/4 150 ft 200 ft 250 ft Selecting Weld Cable Sizes350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m 100 150 200 250 Start Your Professional Welding Career Now − Operating the Welding Generator Engine Control SwitchFront Panel Controls Fine Control Infrequently Cold Weather Engine OperationLoaded Frequently Loaded Typical Stick Welding Connections And Control Settings Stop engineElectrode Standard Receptacles − Operating Auxiliary EquipmentGfci Receptacle Option At least once a month, run engine at Wiring Optional 240 Volt Plug Simultaneous Weld And PowerCurrent Available in Amperes 240 Receptacle Maintenance Label − Maintenance 100 Routine Maintenance200 500 Servicing Air Cleaner Stop engine and let cool Changing Engine Oil, Oil Filter, and Fuel FilterClose valve and valve cap Before Adding Oil Running engine Idle Speed Adjustment Adjusting Engine SpeedWeld/Power Speed Adjustment Turn idle speed screw for fine ad- justments Overload Protection Stop engine. Disconnect negative − battery cableServicing Optional Spark Arrestor Fuse F1 See Section Welding Troubleshooting − TroubleshootingGenerator Power Troubleshooting Trouble Remedy Check receptacle wiring and connections Engine TroubleshootingErs SR2 and SR3 Check fuel level Control switch S2, and throttle solenoid TS1 − Parts ListRecommended Spare Parts Recommended Spare Parts Circuit Diagram For Welding Generator − Electrical Diagrams 240 424-B Selecting Equipment − Generator Power Guidelines How Much Power Does Equipment Require? Grounding When Supplying Building SystemsUse ground device as stated Electrical codes 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 Striking an Arc Electrode and Amperage Selection ChartScratch Technique Tapping Technique Good Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder End View Of Work Angle Side View Of Electrode Angle 10-30 Electrode Movement During Welding Conditions That Affect Weld Bead ShapeElectrode Angle Normal Lap Joint Groove Butt JointsTee Joint Or Less Weld Test TroubleshootingPossible Causes Corrective Actions Weld bead Good Penetration Excessive Penetration Lack of Penetration Good PenetrationMetal remains Direction SOCKET/WRENCH Selection Table Standard Metric Service SupportAssistance Hobart Welding Products Contact your Distributor for