OM-236297 Page 21
!
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 / 250 981-A
2
3
4
Tools Needed:
7-4.
Replacing Or Cleaning Gun Drive Roll Bearing In Pistol-Grip Guns
1
7-5.
Replacing Head Tube Liner In Pistol-Grip Guns
Ref. 803 917-A / 250 981-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
gun drive roll (see Section 7-3).
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: