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| TROUBLESHOOTING & REPAIR | ||||
| 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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| The engine starts and runs at | OUTPUT PROBLEMS | 1. Check for loose or broken |
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| 1. Check for loose or missing |
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| correct speed, but there is no, or | brushes in the DC exciter. | wires between the exciter |
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| very low, welder output voltage. | 2. The exciter may need | brushes and the DC |
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| There is no DC auxiliary output | receptacle and the fine |
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| “flashing.” See Flashing the | current control field rheostat. | |||
| voltage. |
| Fields in this section. | See the Wiring Diagram. |
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| 2. Perform the DC Exciter Test. | |
| The engine starts and runs at | 1. Check the welding cables for | 1. Check the fine current control | ||
| the correct speed but there is no, | loose or faulty connections. | field rheostat for resistance |
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| or very low, welder output. The | 2. Check for loose or missing | and proper operation. Normal | ||
| DC auxiliary output voltage is | resistance is 64 ohms. Check | |||
| normal. |
| brushes in the welding | associated wires for loose or | |
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| generator. | faulty connections. See the |
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| 3. Check for open circuit voltage | Wiring Diagram. |
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| at weld studs, check heavy | 2. Perform the Main Generator | |
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| current carrying leads for loose | Shunt Field Winding Test. |
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| or corroded connections | 3. Check the continuity of the |
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| interpole coils. They should |
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| show continuity from the |
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| positive brusholders to the |
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| positive output terminal and |
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| should NOT be grounded to |
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| the generator frame. |
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| 4. Check the continuity of the |
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| series coils. They should |
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| show continuity from the |
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| negative brusholders, through | |
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| the current selector switch, to | |
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| the negative output terminal |
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| and should NOT be grounded | |
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| to the generator frame. |
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| 5. The main armature may be |
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| faulty. Check for grounds |
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| and/or shorts. |
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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
