Miller Electric XR Control - Manual (Page 42)

OM-1594 Page 36
Turn Off wire feeder and welding
power source.
1
Top Cover
2 Pressure Roll Assembly
3 Screw
4 Pressure Roll
Remove as shown.
Use a wire brush to clean bearing.
Reinstall with washers, and tighten
screw.
Close pressure roll assembly.
Reinstall top cover.
Ref. 151 599−F
2
3
4
Tools Needed:
7-7. Replacing Or Cleaning Gun Drive Roll Bearing In Pistol-Grip Guns
1
7-8. Replacing Head Tube Liner In Pistol-Grip Guns
Ref. 803 917-A
.
Turn OFF coolant supply
before removing head tube on
water-cooled gun.
The standard head tube liner will
accommodate wire diameters from
.030-1/16 wire size.
When changing wire size, change
control box drive roll and idler (see
Section 7-1), gun drive roll (see
Sections 7-2 and 7-6).
1
Cover
2 Screw
3 Clamp
Loosen clamp screws and remove
clamp.
4
Head Tube
Remove head tube from gun.
5
Liner
Pull liner out of head tube.
Insert new liner into head tube and
reinstall head tube onto gun.
.
A twisting motion may be need-
ed to feed liner thru head tube.
4
5
5/32 in
1
2
3
4
Tool Needed: