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

Page 34
Image 34
Miller Electric XR W, XR A manual Changing Or Cleaning Gun Drive Roll