| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed througout this manual | |||
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| PROBLEMS | POSSIBLE CAUSE | RECOMMENDED | |
| (SYMPTOMS) | COURSE OF ACTION | ||
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| FUNCTION PROBLEMS |
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3. Poor arc striking with sticking or | A. Improper procedures or tech- | A. See “Gas Metal Arc Welding | ||
niques. | Guide” | |||
and ropy looking bead, or elec- |
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trode stubbing into plate while | B. Improper gas shielding. | B. Clean gas nozzle. Make certain | ||
welding. |
| 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 | |
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| rubber seal for any sign of de- | |
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| terioration or damage. Be sure | |
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| set screw in brass connector is | |
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| in place and tightened against | |
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| the liner bushing. | |
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4. 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 tem- | |
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| perature antiseize lubricant (such | |
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| 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®