Hobart OM-1581 manual Changing Or Cleaning Gun Drive Roll

5-2. 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
1	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-
	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 5-3.

Thread welding wire through gun, and adjust drive roll pressure, if necessary (see Section 3-16). Close and secure pressure roll assembly. Reinstall top cover.

2

Tools Needed:	6	7
5/64 in

Ref. 151 599-C

OM-1581 Page 30