Hobart Welding Products OM-1594 manual Changing Gun Contact Tip

6-6. Changing Gun Contact Tip

3

1

4

2

1Contact Tip Wrench

2Nozzle

Insert wrench into nozzle over contact tip.

3Compression Nut

4Contact Tip

Loosen nut. Pull out contact tip.

Install new contact tip.

Tighten nut just until contact tip is secure. Overtightening nut will damage adapter.

150 437

6-7. Replacing Or Cleaning Gun Drive Roll In Pistol-Grip Guns

5

3

4

2

6 7

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.

1

3 Setscrew

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- ameter contact tip is recom- mended. See options in Parts List.) 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, see

Section 6-1.

Thread welding wire through gun, and adjust drive roll pressure, if necessary (see Section 4-14). Close and secure pressure roll assembly. Reinstall top cover.

Tools Needed:

5/64 in

Ref. 151 599-C

OM-1594 Page 35