TROUBLEShOOTING | ||
| Observe all Safety Guidelines detailed throughout this manual |
|
PROBLEMS
(SYMPTOMS)
POSSIBLE CAUSE
REMEDY
PROBLEMS
Poor arc striking with sticking or | 1. Improper procedures of tech- | 1. See “Gas Metal Arc Welding |
niques. | Guide” (GS100). | |
and ropy looking bead, or electrode |
|
|
stubbing into plate while welding. | 2. Improper gas shielding. | 2. Clean gas cone. Make certain that |
|
| gas diffuser is not restricted. Make |
|
| certain that gas cylinder is not |
|
| empty or turned off. Make certain |
|
| gas solenoid valve is operating |
|
| and gas flow rate is proper. |
|
| 3.Remove gun liner and check rub- |
|
| ber seal for any sign of deteriora- |
|
| tion or damage. Be sure set screw |
|
| in brass connector is in place and |
|
| tightened against the liner bush- |
|
| ing. |
|
|
|
Tip seizing in diffuser. | 1. Tip overheating due to prolonged | 1. Do not exceed current and duty |
| or excessive high current and/or | cycle rating of gun. |
| duty cycle welding. |
|
|
| 2. A light application of high temper- |
|
| ature antiseize lubricant (such as |
|
| Lincoln E2067 Graphite Grease) |
|
| may be applied to tip threads. |
|
|
|
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® PRO 250, 350, 450 & 550 AMP