Hobart Welding Products OM-184 693C manual Gun Drive Assembly Maintenance

4-3. Gun Drive Assembly Maintenance

3

1

2

4

Retract wire onto spool.

1Setscrew

2Current 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 diameter contact tip is rec- ommended. See options in Parts List.) Lightly grease top of tab be- fore reinstalling.

3 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.

4 Bearing

Use wire brush to clean bearing. Line up drive roll groove with bear- ing groove and liner opening. Tighten setscrews.

Thread welding wire through gun (see Section 3-3). Close and se- cure pressure roll assembly. Adjust drive roll pressure, if necessary (see Section 3-8). Reinstall top cover.

Tools Needed:

5/16 in

Ref. 149 967-C / Ref. 800 945-A

OM-184 693 Page 11