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:
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