Miller Electric S-74S, S-74D manual Installing And Threading Welding Wire, Nonconductive Surface

5-6. Installing And Threading Welding Wire

Install wire spool. Adjust tension nut so	Install wire guides and
wire is taut when wire feed stops.	anti-wear guide.

Install drive rolls.

	Pressure
	Indicator
Pressure	Scale
Adjust
Rear	Pressure
Rolls
	Adjust
	Front
	Rolls

No Wire Slip	Wire Slips
NONCONDUCTIVE	NONCONDUCTIVE
SURFACE	SURFACE

Drive Rolls		Tools Needed:
	Back Of Gun	3/16, 5/64 in
		15/16, 3/8 in

End Of Liner

. Be sure that outlet cable has proper size			. For soft wire or small diameter stainless	. To adjust drive roll pressure, hold nozzle
liner for the welding wire size. When			steel wire, reduce drive roll pressure on	about 2 in (51 mm) from nonconductive
installing gun,	position	liner	the rear roll to half that of the front rolls.	surface and press gun trigger to feed wire
(extending from outlet wire guide) as				against surface. Tighten knob so wire
close as possible to drive rolls without				does not slip. Do not overtighten. If con-
touching.				tact tip is completely blocked, wire should
Install gun. Lay gun cable out straight. Cut off				slip at the feeder (see pressure adjust-
				ment above).Cut wire off. Close cover.
end of wire. Push wire through guides up to
drive rolls; continue to hold wire. Press Jog
button to feed wire out gun.				Ref. 156 929-A / Ref. 150 922 / Ref. 156 930 / S-0627-A

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