Miller 300741 Owner's Manual - Page 19
Browse online or download pdf Owner's Manual for Welding System Miller 300741. Miller 300741 32 pages. Mpa drive assembly
Print Page5-5. Installing And Threading Welding Wire
Pressure
Adjust
Rear
Rolls
.
For best wire feeding performance, be
sure that the outlet cable has the proper
size liner for the welding wire size being
used. Also, when the gun is installed, the
liner extending from the back of the gun
should be as close to the drive rolls as
possible, 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.
Pressure
Indicator
Scale
Pressure
Adjust
Front
Rolls
No Wire Slip
NONCONDUCTIVE
SURFACE
Drive Rolls
Back Of Gun
End Of Liner
.
When using a push/pull gun and pressure
blocking clips, do not adjust pressure.
.
For aluminum wire set pressure indicator
scale as light as possible.
Install wire guides and
anti-wear guide.
Install drive rolls.
Wire Slips
NONCONDUCTIVE
SURFACE
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. 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.
Ref. 156 929-A / Ref. 150 922 / Ref. 156 930 / S-0627-A
3/16, 5/64 in.
15/16, 3/8 in.
OM-247517 Page 15