Miller Spoolmatic 30A Owner's Manual download pdf (Page 24)

OM-211 958 Page 20

6-4. Gun Drive Assembly Maintenance

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

Retract wire onto spool.

1 Setscrew

2 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.

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

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Miller Spoolmatic 30A Owner's Manual Page 24