Lincoln Electric SVM194-A service manual Generator Brush, Commutator Inspection, Service Procedure

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

F-5	TROUBLESHOOTING AND REPAIR			F-5
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS		POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)		MISADJUSTMENT(S)	COURSE OF ACTION
There is no, or very low weld		OUTPUT PROBLEMS	Perform the Welding
		Check that the remote/local
output voltage. The auxiliary		switch (If so equipped) is	Generator Brush and
output is normal.		positioned correctly.	Commutator Inspection and
		If a remote current control is	Service Procedure.
		being used, try switching to	Perform the	Shunt Field Coil
		local control. The remote	Resistance and Ground
		current control may be faulty.	Test.	Shunt Field
		Check all leads and cables for	Perform the
		damaged or poor connections.	Circuit Voltage Test.
			Check for damaged or poor
			connections at the brush
			holders, series and interpole
			coils, weld output terminals,
			and all the conductors
			connecting these components.
			The Armature may be faulty.
There is no auxiliary voltage,		Check that the auxiliary power	Check for auxiliary voltage at
weld output is normal.		circuit breakers are not tripped.	the receptacle input terminals,
		If the machine is equipped with	if normal voltage is present,
		a ground fault circuit	replace receptacle.
		interrupter (GFCI), it may be	Check for auxiliary voltage at
		tripped.	the connections closest to the
		NOTE: GFCIs will not reliably	exciter stator windings. See
		reset, unless engine is	wiring diagram.
		operating at high idle	• If normal voltage is present,
		RPM.	check the wiring and circuit
		Check all leads and cables for	breakers between the test
			points and the receptacle.
		damaged or poor connections.	Repair or replace any defective
			parts or wiring.
			• If normal voltage is not
			present, check for damaged
			conductors between the test
			points and the winding. If the
			conductors are good, the stator
			is defective.

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