Lincoln Electric Classic 300 MP Service Manual page 105

LINCOLN ELECTRIC
32. Label and disconnect lead 820 from the ground stud
See Wiring Diagram.
33. Label and Disconnect lead 11B from circuit breaker CB1
See Wiring Diagram. NOTE: Lead 11B passes thru the current transformer.
34. Label, disconnect and clear any other leads in preparation for removing of the front panel to allow
for the removal of the exciter stator. Cut any cable ties as necessary.
35. Using a 1/2" nutdriver and 1/2" open-end wrench, remove the bolt, nut and washers securing each
side of the front panel to the fuel tank rail. See
36. Using a 9/16" nutdriver and 9/16" open-end wrench remove the two bolts, nuts and lock washers
securing each side of the front panel to the base assembly. See Figure F.69.
37. Carefully slide the front panel assembly to the side of the machine to allow for the removal of the
exciter stator. Cut any cable ties as necessary.
38. Lift the eight brushes from the commutator. Note the position of the brushes for reassembly.
39. Using a 1/2" nutdriver, disconnect and clear the four heavy cables and the white and yellow voltage
sense leads from the generator brush holders to the coils in the generator frame. See Wiring
Diagram. Note the locations of the white and yellow voltage sense leads.
40. Using a 5/8" wrench, remove the four bolts securing the stator frame to the generator frame. Note
the "drill spot" for reassembly. See
41. Using a 7/16" nutdriver, loosen (do not remove) the generator brush holder clamping bolt. Note
the drill spot for reassembly. See
42. Carefully pry the stator end bracket away from the generator frame assembly. NOTE: The generator
brush holder assembly will also be removed.
43. The exciter stator can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position new stator assembly into the machine. Align the mating parts with the drill spot.
2. Using a 5/8" nutdriver, attach the four bolts securing the stator frame to the generator frame.
3. Check the armature air gap. Minimum gap is .035". Loosen the four mounting bolts; adjust and re-
tighten if necessary.
4. Using a 7/16" nutdriver, tighten the generator brush holder clamping bolt.
5. Using a 1/2" nutdriver, connect the four heavy cables and the white and yellow voltage sense leads
from the generator brush holders to the coils in the generator frame. See Wiring Diagram.
6. Place the eight commutator brushes back into the proper positions.
7. Carefully position the front panel assembly on the machine.
8. Using a 9/16" nutdriver and 9/16" open-end wrench attach the two bolts, nuts and lock washers
securing each side of the front panel to the base assembly.
9. Using a 1/2" nutdriver and 1/2" open-end wrench, attach the bolt, nut and washers securing each
side of the front panel to the fuel tank rail.
10. Connect and route any additional leads previously disconnected. Replace any cable ties as
necessary.
11. Connect lead 11B to circuit breaker CB1
Lead 11B passes thru the current transformer.
12. Connect lead 820 to the ground stud
13. Connect lead 810 to the circuit breaker CB2 on the lower control
on the lower control
Figure F.69.
Figure F.70.
Figure F.70.
on the lower control
on the lower control
Classic® 300 MP Service Manual
panel. See
on the lower control
panel. See Wiring Diagram. NOTE:
panel. See Wiring Diagram.
panel. See Wiring Diagram.
Figure F.68.
Figure F.68.
panel. See
100