Hobart Welding Products OM-1594 Replacing Head Tube Liner In Pistol-Grip Guns, Pressure Roll

6-8. Replacing Or Cleaning Gun Drive Roll Bearing In Pistol-Grip Guns

Turn Off wire feeder and welding power source.

	1	Top Cover
	2	Pressure Roll Assembly
	3	Screw
1	4	Pressure Roll

4

3

Tools Needed:

Remove as shown.

Use a wire brush to clean bearing. Reinstall with washers, and tighten screw.

Close pressure roll assembly.

Reinstall top cover.

2

Ref. 151 599–C

6-9. Replacing Head Tube Liner In Pistol-Grip Guns

Insert chamfered end of liner into head tube.

6

5

4 1

2

3

4

Tool Needed:

5/32 in

.Turn OFF coolant supply before removing head tube on water-cooled gun.

Head tube liner is available for the following wire size ranges:

.030-.040 wire size

.047-.062 wire size

When changing wire size, change control box drive roll and idler (see Section 6-1), gun drive roll (see Sections 6-2 and 6-7), and gun head tube liner.

1Cover

2Screw

3Clamp

Loosen clamp screws and remove clamp.

4 Head Tube

Remove head tube from gun.

5O-Ring

6Liner

Pull liner and o-ring out of head tube.

Insert new o-ring and liner (o-ring first) into head tube and reinstall head tube onto gun.

Ref. 143 117-E / Ref. 151 599

OM-1594 Page 36