Miller Electric XR A - Manual (Page 35)

OM-1581 Page 31
6-3. Changing Feeder Drive Roll And Wire Inlet Guide
Turn Off wire feeder and welding
power source. Lay wire conduit out
straight.
Open gun pressure roll assembly,
and cut welding wire off at contact
tip.
1
Pressure Roll Assembly
2 Wire Spool
For welding power sources without
contactor, retract wire onto spool.
For welding power sources with a
contactor, energize power source,
turn On feeder, press Brake Re-
lease button, and retract wire onto
spool.
3
Shaft
4 Setscrew
5 Drive Roll
Use wire brush to clean drive roll.
Install drive roll with desired groove
in, and turn drive roll so one
setscrew faces flat side of shaft.
6
Bearing
7 Wire Conduit Fitting
Line up drive roll groove with bear-
ing groove and opening in conduit
fitting. Tighten setscrews.
8
Wire Inlet Guide
Pull guide toward rear of feeder to
remove. Install new guide.
Thread welding wire and adjust
drive roll pressure, if necessary
(see Section 4-14). Close and se-
cure pressure roll assembly. Close
and latch door.
Close gun pressure roll assembly,
and reinstall gun cover.
151 778 / Ref. 151 781-B
Tools Needed:
5/16 in
2
6
1
8
7
4
5
3