Miller Electric 15A, 30A manual Gun Drive Assembly Maintenance

6-4. 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 di- ameter contact tip is recom- mended. See options in Parts List.) Lightly grease top of tab before rein- stalling.

3 Drive Roll

Use wire brush to clean drive roll. Install drive roll with desired groove down, and turn drive roll so one set- screw 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. Tight- en setscrews.

Thread welding wire through gun (see Section 4-3). Close and se- cure pressure roll assembly. Adjust drive roll pressure, if necessary (see Section 4-8). Reinstall top cov- er.

Tools Needed: 5/16 in

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

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