Miller S-75D Owner's Manual - Page 22

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5-11. Installing Welding Wire And Adjusting Pressure Drive Setting

Install wire spool. Adjust tension nut so
wire is taut when wire feed stops.
.
Pressure door as-
sembly not shown.
No Wire Slip
NONCONDUCTIVE
SURFACE
1
Drive Roll Pressure Adjustment Lever
2
Notch In Lever (Indicates Pressure
Settings)
Pressure drive settings range from 1 to 8 with
8 being the maximum setting.
.
When using cored welding wire use
knurled drive rolls.
.
For aluminum (soft) wire set pressure
drive setting at 4 or below.
OM-223 605 Page 18
Drive Rolls
Back Of Gun
End Of Liner
Wire Slips
NONCONDUCTIVE
SURFACE
.
Be sure that gun has proper size liner for
the welding wire size.
When installing gun, the liner should extend
into the PD continuous guide (or exit guide if
used) as far as possible without interfering
with the guide.
Install gun. Lay gun cable out straight. Cut off
end of wire. Push wire through guide up to
drive rolls; continue to hold wire. Press Jog
button to feed wire out gun.
Thread wire.
Adjust tension.
2
1
Tools Needed:
To adjust drive roll pressure, hold nozzle
about 2 in (51 mm) from nonconductive
surface and press gun trigger to feed wire
against surface. Adjust pressure drive lever
so wire does not slip. Do not overtighten. If
contact tip is completely blocked, wire should
slip at the feeder (see pressure adjustment
above.)
Cut wire off.
Ref. 804 190-B
15/16 in