Lincoln Electric SVM 119-A service manual Connect Output Components, Connections

		A-7	INSTALLATION			A-7
TOC	TOC	CONNECT OUTPUT COMPONENTS		GUN	LINER AND CONTACT	TIP
				INSTALLATION
Section	Master
		INSTALL THE WORK CLAMP		The Magnum 250L gun and cable provided with the
to	to	Attach the work clamp to the cable which extends from		WIRE-MATIC 255 is factory installed with a liner for a
		the front of the machine using the following procedure:		.035-.045”	(0.9-1.2mm) diameter electrode and an
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				.035” (0.9mm) contact tip.
		1. Insert the lug on the end of the work cable through		1. If a .045” diameter wire size is to be used, install
			the strain relief hole in the work clamp handle. See
			Figure A.7.	the .045” contact tip (also provided).
		2. Slide the work cable through the hole up to the bolt		2. For other wire sizes, use the following procedure
			and nut.	for contact tip and gas nozzle installation.		See
				Figure A.8.

3. Fasten work cable using the bolt and nut provided.

		a.	Choose the correct size contact tip for the
TOC	TOC		electrode being used (wire size is stenciled on
			the side of the contact tip) and screw it snugly
Section	Master		into the gas diffuser.
		b	Be sure the nozzle insulator is fully screwed
to	to		onto the gun tube and does not block the gas
			holes in the diffuser.
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		c.	Slip the appropriate gas nozzle onto the noz-
			zle insulator. Either a standard .50" (12.7mm)
			or optional .62” (15.9mm) I.D. slip-on gas noz-
			zle may be used and should be selected
			based on the welding application.
		d.	Adjust the gas nozzle for the GMAW process
		FIGURE A.7 - Installing The Work Clamp.	to be used.

TOC	TOC		For the short-circuiting transfer process, the contact tip
Section	Master	OUTPUT POLARITY CONNECTION	end should be flush to extended to .12" (3.2mm). See
			Figure A.8.

to	to	WARNING	For the spray transfer process, the contact tip should
			be flush to recessed .12" (3.2mm). See Figure A.8.
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		Turn the welder Power Switch OFF before chang-
		ing output connection.
		____________________________________

The welder is shipped from the factory connected for electrode positive (+) polarity. This is the normal polar- ity for GMA welding.

TOC	TOC	If negative (-) polarity is required, interchange the con-
		nection of the electrode and work cables at the output
Section	Master	terminals located in the wire drive compartment near
		the front panel. The electrode cable, which is attached
		to the wire drive, is to be connected to the negative (-)	FIGURE A.8 - Contact Tip and Electrode
		labeled output terminal. The work cable which is
to	to		Connections.
		attached to the work clamp is to be connected to the
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		positive (+) labeled output terminal.
		WIRE-MATIC 255