Miller Electric S-74DX - Manual (Page 18)

OM-1500-9 Page 14
5-6. Installing And Threading Welding Wire
Ref. 156 929-A / Ref. 150 922 / Ref. 156 930 / 802 954 / S-0627-A
Tools Needed:
.
Be sure that outlet cable has proper size
liner for the welding wire size. When
installing gun, position liner
extending from outlet wire guide as
close as possible to drive rolls without
touching.
Install gun. Lay gun cable out straight. Cut off
end of wire. Push wire through guides up to
drive rolls; continue to hold wire. Press Jog
button to feed wire out gun.
.
For soft wire or small diameter stainless
steel wire, reduce drive roll pressure on
the rear roll to half that of the front rolls.
.
To adjust drive roll pressure, hold nozzle
about 2 in (51 mm) from nonconductive
surface and press gun trigger to feed wire
against surface. Tighten knob so wire
does not slip. Do not overtighten. If con-
tact tip is completely blocked, wire should
slip at the feeder (see pressure adjust-
ment above).Cut wire off. Close cover.
NONCONDUCTIVE
SURFACE
NONCONDUCTIVE
SURFACE
No Wire Slip Wire Slips
Install wire spool. Adjust tension nut so
wire is taut when wire feed stops.
Install wire guides and
anti-wear guide.
Install drive rolls.
3/16, 5/64 in
15/16, 3/8 in
Pressure
Adjust
Front
Rolls
Pressure
Indicator
Scale
Pressure
Adjust
Rear
Rolls
Drive Rolls
End Of Liner
Gun Cable