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| TROUBLESHOOTING & REPAIR |
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| PROBLEMS |
| POSSIBLE AREAS OF |
| RECOMMENDED |
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| (SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| The actual welding current is | OUTPUT PROBLEMS |
| 1. The engine RPM may be low. |
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| 1. Check the welding cables for |
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| much less than is indicated on | loose or faulty connections. |
| If necessary perform the |
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| the dials. |
| 2. The welding cables may be |
| Engine Throttle Adjustment |
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| Test. (PERKINS code 10929 |
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| excessively long or coiled. |
| ONLY) | DC Exciter Test. |
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| 3. Check the main DC generator |
| 2. Perform the |
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| brushes for good commutation |
| 3. Check the fine current control |
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| and alignment. Contact the |
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| Lincoln Electric Service Dept. 1- |
| field rheostat for resistance |
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| and proper operation. Normal |
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| resistance is 64 ohms. Check |
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| associated wires for loose or |
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| faulty connections. See the |
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| Wiring Diagram. |
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| 4. Check the current range |
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| selector switch and contacts |
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| for proper operation. |
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| 5. Perform the | Main Generator |
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| Shunt Field Winding Test. |
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| 6. The main armature may be |
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| faulty. Check for grounds. |
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| The actual welding current is | 1. Check the main DC generator |
| 1. The engine operating speed |
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| much greater than is indicated | brushes for good commutation |
| may be too high. If necessary |
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| on the dials. |
| and alignment. Contact the |
| perform the | Engine Throttle |
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| Lincoln Electric Service Dept. |
| Adjustment Test. (PERKINS |
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| code 10929 ONLY) |
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| 2. While the machine is loaded, |
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| check the series coils for signs |
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| of “arcing.” This condition |
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| could point to shorted turns in |
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| the series coils. |
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| 3. Perform the | DC Exciter Test. |
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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 the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call
