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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines detailed in the beginning of this manual. |
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PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| OUTPUT PROBLEMS | 1. Check the fine current control |
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The welding output varies |
| 1. Check for loose or faulty |
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abnormally. The auxiliary output | welding cables. | field rheostat for resistance |
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remains constant. The engine is | 2. This may be a normal | and proper operation. Normal |
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resistance is 64 ohms. Check |
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operating correctly. |
| condition. The machine will | associated wires for loose or |
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| normally lose some output as | faulty connections. See the |
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| the components are heated. | Wiring Diagram. |
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| 3. Check for loose, worn, dirty or | 2. Perform the Main Generator |
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| poorly seated main DC | Shunt Field Winding Test. |
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| generator brushes. | 3. Check the current range |
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| 4. The main armature |
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| selector switch and contacts |
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| commutator may need | for proper operation. |
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| cleaning. | 4. While the machine is loaded, |
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| check the interpole and series |
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| coils for signs of “arcing.” |
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| This condition would indicate |
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| shorted turns in the “arcing” |
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| coil. |
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| 5. The main armature may be |
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| faulty. Check for grounds. |
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The engine starts and runs at | 1. Check the DC receptacle and | 1. Check for loose or faulty |
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the correct speed, but there is | plug for loose or faulty | connections or wires at the |
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no DC auxiliary output voltage | connections. | 120 VDC receptacle and |
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at the 115VDC receptacle. The | 2. Check the 15 Amp fuse. (Not | associated circuitry. See the |
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welding generator is functioning | Wiring Diagram. |
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correctly. |
| on GM 3.0L gas) |
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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
