| 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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Poor arc striking with sticking or | a. Improper procedures or | a. See “Gas Metal Arc Welding | ||
techniques. | 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 | |
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| rubber seal for any sign of | |
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| deterioration or damage. Be sure | |
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| set 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 300 & 400