| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual | |||
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| PROBLEMS | POSSIBLE CAUSE | REMEDY | |
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| PROBLEMS |
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Drive rolls turn, but wire will not | a. Gun cable kinked and/or twisted. | a. Keep as straight as possible. | ||
feed or wire feeding is rough. |
| Inspect cable and replace if | ||
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| necessary. | |
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| b. Wire jammed in gun and cable. | b. Remove wire from gun and cable | |
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| – feed in new wire. Note any | |
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| obstruction. Replace liner if | |
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| necessary. | |
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| c. Incorrect drive rolls and guide | c. Be sure the wire diameter being | |
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| tubes. | used is stamped on drive rolls | |
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| and guide tubes. Replace if | |
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| necessary. | |
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| d. Gun cable liner dirty. | d. Clean liner or replace. | |
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| e. Worn drive rolls. | e. Replace or reverse split drive roll | |
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| type. | |
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| f. Electrode rusty and/or dirty. | f. Replace the electrode if it is | |
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| rusty. | |
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| g. Worn or improper size cable liner. | g. Replace cable liner. | |
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| h. Partially flashed, melted or | h. Replace the contact tip. | |
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| improper size contact tip. |
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Variable or “hunting” arc. | a. Contact tip worn or incorrect size. | a. Replace contact tip. | ||
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| b. Worn or undersize work cables or | b. Inspect – repair or replace as | |
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| poor ground connections. | necessary. | |
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| c. Loose electrode connections. | c. Be sure the following connections | |
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| are tight: electrode cable to wire | |
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| feeder and power source, work | |
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| cable to power source and work, | |
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| gun cable to wire feeder contact | |
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| block, gun nozzle to body and | |
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| contact tip to nozzle. | |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
MAGNUM 300 & 400