6-2. Changing Or Cleaning Gun Drive Roll
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| Turn Off wire feeder and welding | |
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| power source. | |
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| 1 | Top Cover |
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| 2 | Pressure Roll Assembly |
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| Cut off wire where it enters | |
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| pressure roll assembly area. | |
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| 3 | Setscrew |
5 |
| 4 | Current |
| This tab helps prevent burnback | ||
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| caused by welding arcs inside the | |
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| contact tip. This tab may be re- | |
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| moved to provide an insulated drive | |
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| 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- | |
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| stalling. | |
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| 5 | Drive Roll |
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| Use wire brush to clean drive roll. | |
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| Install drive roll with desired groove | |
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| down, and turn drive roll so one | |
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| setscrew faces flat side of shaft. | |
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| 6 | Bearing |
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| 7 | Liner |
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| Line up drive roll groove with bear- | |
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| ing groove and liner opening. | |
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| Tighten setscrews. |
If changing drive roll in feeder, proceed to Section
Thread welding wire through gun, and adjust drive roll pressure, if necessary (see Section
2
Tools Needed: | 6 | 7 |
5/64 in |
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Ref. 151