TROUBLESHOOTING | ||
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| Observe all Safety Guidelines detailed throughout this manual |
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PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
| Poor arc striking with sticking or | a. Improper procedures or tech- | a. See “Gas Metal Arc Welding | |
| niques. | Guide” (GS100). | ||
| and ropy looking bead, or electrode |
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| stubbing into plate while welding. | b. Improper gas shielding. | b. Clean gas cone. Make certain | |
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| that gas diffuser is not restricted. | |
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| Make certain that gas cylinder is | |
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| not empty or turned off. Make | |
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| certain gas solenoid valve is | |
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| operating and gas flow rate is | |
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| proper. | |
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| Remove gun liner and check rub- | |
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| ber seal for any sign of deterio- | |
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| ration or damage. Be sure set | |
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| screw in brass connector is in | |
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| place and tightened against the | |
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| liner bushing. | |
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| Tip seizes in diffuser. | a. Tip overheating due to prolonged | a. Do not exceed current and duty | |
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| or excessive high current and/or | cycle rating of gun. | |
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| duty cycle welding. |
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| A light application of high | |
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| temperature antiseize lubricant | |
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| (such as Lincoln E2067 Graphite | |
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| Grease) may be applied to tip | |
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| threads. | |
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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® 400 DUAL PROCEDURE GUNS
