Lincoln Electric IM10005 Symptoms, Contact your local Lincoln Authorized Field Service Facility

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E-2		TROUBLESHOOTING	E-2

	Observe all Safety Guidelines detailed throughout this manual

	PROBLEMS	POSSIBLE	RECOMMENDED
	(SYMPTOMS)	CAUSE	COURSE OF ACTION

PROBLEMS

No generator power or welding output.	1.	Disconnect anything plugged into
		auxiliary receptacles and weld loads.
	2.	Open lead in flashing or field circuit.
	3.	Open flashing diode (D1)
	4.	Faulty brushes.
	5.	Faulty rheostat (R1).
	6.	Faulty field rectifier (D1).
	7.	Faulty capacitor (C1).
	8.	Faulty stator field winding.
	9.	Faulty rotor.
	10. Dirty slip rings, clean slip rings when
		not in use.

Generator power is available but unit	1.	Loose connection to output stud.
will not weld.
	2.	Work not connected.
	3.	Electrode holder loose.
	4.	No open circuit voltage at output
		studs. Open lead in weld circuit.

If all recommended possible areas of misadjustment have been checked and the problem persists,

Contact your local Lincoln Authorized Field Service Facility.

5. Faulty reactor (L1).

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

BULLDOG™ 140

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Contents Bulldog Safety California Proposition 65 WarningsElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcPlease Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationTable of Contents Installation Technical Specifications Bulldog 140 K2708-1Storing Safety PrecautionsLocation and Ventilation Engine Exhaust can killTilting PRE-OPERATION Engine ServiceStacking LiftingTable A.1 Recommended Welding Cable Size and Length Electrical Output ConnectionsWelding Cable Connections Electrical Connections 5INSTALLATIONA-5Auxiliary Power Receptacles Machine GroundingPremises Wiring Circuit BreakersTable A.2 Electrical Device USE with the Bulldog Type Common Electrical Devices Possible ConcernsOperation Output Panel Controls LimitationsWELDER/GENERATOR Controls Engine Operation Gasoline Engine ControlsBefore Starting the Engine Starting the EngineGenerator Operation Table B.1 Generator Power Applications Welding Operation Control Function / Operation Current Control DialMaterial Thickness Electrode Type Size Setting Welding GuidelinesWhat Happens in the Arc? Welding circuit for Stick shielded metal arc weldingCorrect Arc Length Correct Welding PositionCorrect Way to Strike An Arc Correct Welding SpeedTypes of Welds PracticeCommon Metals Multiple Pass Welds Fillet JointsPenetration Welding in the Vertical PositionVertical-Up Welding Vertical-Down WeldingWelding Sheet Metal How to Hardface the Sharp Edge Metal to Ground WearOverhead Welding Hardfacing To Reduce WearWelding Cast Iron Cast Iron Plate PreparationLow Hydrogen Group AWS E7018 Selecting ElectrodesOut-of-Position Group AWS E6011 High-Speed Group AWS E6013 Lincoln Electric Accessories AccessoriesOPTIONS/ACCESSORIES Engine Maintenance MaintenanceRoutine and Periodic Maintenance Engine Adjustments Finger Guard AreaOperational Clearance Table D.1 Engine Maintenance PartsSpark Plug Service GENERATOR/WELDER Maintenance Screws BrushesFigure D.7. Major Component Locations Troubleshooting HOW to USE Troubleshooting GuideSymptoms Contact your local Lincoln Authorized Field Service FacilityTroubleshooting Engine requires service to head, head gasket, and/or valves Diagrams Dimension Print M22146Bulldog Precaucion Guards off