Lincoln Electric SVM194-A service manual Brush and Slip, Welding, Flash Voltage

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F-10	TROUBLESHOOTING AND REPAIR			F-10
Observe Safety Guidelines detailed in the beginning of this manual.
	PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
The welding arc frequently “pops		WELDING PROBLEMS
			The engine RPM may be
		The fine current control
out”. Welding heat seems		rheostat may be set too low.	incorrect; perform the Engine
normal and auxiliary output		Try increasing the fine current	RPM Adjustment Test.
voltage appears normal.		control setting. Drop the range	Check the exciter brushes
		selector to a lower setting if	and slip rings. If necessary,
		arc is too hot.	perform the	Brush and Slip
		If a remote control is being	Ring Service Procedure.
		used, try switching to local	Check the DC welding
		control. The remote control	generator brushes and
		unit may be faulty.	commutator. If necessary,
		Check welding cables for	perform the	Welding
		damaged or poor connections.	Generator Brush and
		Welding cable may be	Commutator Inspection and
			Service procedure.
		excessively long, too small, or
		coiled. Try using a set of short	Perform the	Flash Voltage
		test cables of adequate size.	test.	Shunt Field
			Perform the
			Circuit Voltage Test.
			Check that the rocker is
			aligned to the factory drill
			mark, and perform the
			Rocker Adjustment
			Procedure if necessary.

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CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

CLASSIC® 300D & 300G