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E-2
TROUBLESHOOTING
E-2
BULLDOG™ 140
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
No generator power or welding output.
Generator power is available but unit
will not weld.
1. Disconnect anything plugged into
auxiliary receptacles and weld loads.
2. Open lead in flashing or field circuit.
3. Open flashing diode (D1)
4. Faulty brushes.
5. Faulty rheostat (R1).
6. Faulty field rectifier (D1).
7. Faulty capacitor (C1).
8. Faulty stator field winding.
9. Faulty rotor.
10. Dirty slip rings, clean slip rings when
not in use.
1. Loose connection to output stud.
2. Work not connected.
3. Electrode holder loose.
4. No open circuit voltage at output
studs. Open lead in weld circuit.
5. Faulty reactor (L1).
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.