Miller Electric XR W, XR A manual Changing Or Cleaning Gun Drive Roll

6-2. Changing Or Cleaning Gun Drive Roll

		Turn Off wire feeder and welding
		power source.
		1	Top Cover
		2	Pressure Roll Assembly
		Cut off wire where it enters
		pressure roll assembly area.
		3	Setscrew
5		4	Current Pick-Up Tab
		This tab helps prevent burnback
		caused by welding arcs inside the
		contact tip. This tab may be re-
		moved to provide an insulated drive
		roll. (If tab is removed, a smaller di-
3		ameter contact tip is recom-
	1	mended. See options in Parts List.)
4		Lightly grease top of tab before rein-
		stalling.
		5	Drive Roll
		Use wire brush to clean drive roll.
		Install drive roll with desired groove
		down, and turn drive roll so one
		setscrew faces flat side of shaft.
		6	Bearing
		7	Liner
		Line up drive roll groove with bear-
		ing groove and liner opening.
		Tighten setscrews.

If changing drive roll in feeder, proceed to Section 6-3.

Thread welding wire through gun, and adjust drive roll pressure, if necessary (see Section 4-15). Close and secure pressure roll assembly. Reinstall top cover.

2

Tools Needed:	6	7
5/64 in

Ref. 151 599-F

OM-1581 Page 30