Lincoln Electric Classic 300 MP Service Manual page 66

LINCOLN ELECTRIC
11. If any of these readings are less than 500,000 (500k) ohms, be certain that the windings are
completely dry and check for grounded components or wiring that remain connected to the stator,
such as circuit breakers, receptacles, etc. See Wiring Diagram. If necessary, disconnect and isolate
the stator leads as close to the stator winding as possible.
12. If the low resistance to ground or between individual stator windings is determined to be within the
stator, the stator may be faulty.
13. When testing is complete, connect any previously disconnected leads. See Wiring Diagram.
14. Using a 9/16" open-end wrench and a 9/16" nutdriver, attach the nut, bolt, lock washer and three
flat washers securing each side of the CV box to the fuel tank rail (two sets).
15. Using a 3/8" nutdriver, attach the two screws securing the finger guard panel to the machine.
16. If faulty, perform the Exciter Stator Removal And Replacement Procedure.
17. Perform the Case Cover Replacement Procedure.
TEST POINT A
LEAD 810
LEAD 602C
LEAD 810 OR 11B
LEAD 602C OR 21
Table F. 6 – Exciter stator resistance tests
TEST POINT B
LEAD 11B
LEAD 21
CHASSIS GROUND
CHASSIS GROUND
Figure F.28 – CV box mounting hardware location
Classic® 300 MP Service Manual
EXPECTED READING
LESS THAN 1 OHM (LOW RESISTANCE)
LESS THAN 1 OHM (LOW RESISTANCE)
AT LEAST 500K OHMS (HIGH RESISTANCE)
AT LEAST 500K OHMS (HIGH RESISTANCE)
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