Miller Electric XR Control manual Replacing Head Tube Liner In Pistol-Grip Guns

7-7. Replacing Or Cleaning Gun Drive Roll Bearing In Pistol-Grip Guns

1

4

3

Turn Off wire feeder and welding power source.

1Top Cover

2Pressure Roll Assembly

3Screw

4Pressure Roll

Remove as shown.

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

Close pressure roll assembly. Reinstall top cover.

2

Tools Needed:

Ref. 151 599−F

7-8. Replacing Head Tube Liner In Pistol-Grip Guns

. 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

5control box drive roll and idler (see Section 7-1), gun drive roll (see Sections 7-2and 7-6).

			1	Cover
4			2	Screw
	2	1	3	Clamp
	3		Loosen clamp screws and remove
			clamp.
			4	Head Tube
	4		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.

Tool Needed:

5/32 in

Ref. 803 917-A

OM-1594 Page 36