Lincoln Electric CLASSIC 300G 10659 - Manual (Page 21)

E-3 TROUBLESHOOTING E-3
CLASSIC 300G
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
FLASHING THE FIELDS:
1. Stop the engine welder and disconnect the positive battery terminal.
2. Remove the cover from the exciter.
3. Turn the “Fine Current Adjustment” (rheostat) to “100” on the dial.
4. Using a 12 volt automotive battery, connect its negative terminal to the negative brushholder. The negative
brushholder is the one nearest to the rotor lamination. See the wiring diagram. With the engine NOT running,
touch the positive battery terminal to the positive brushholder. Remove the battery from the circuit.
5. Replace the exciter cover.
6. Reconnect the positive battery cable.
7. Start the welder and the generator voltage should build up.
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSES
RECOMMENDED
COURSE OF ACTION
Welding current too great or too
small compared to indication on the
dial.
Arc continuously pops out.
1. Exciter output low causing low
output compared to dial indica-
tion.
2. Operating speed too low or high.
1. “Current Range Selector” switch
may be set at an intermediate
position.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.