Lincoln Electric Fleet 650 Service Manual page 83

LINCOLN ELECTRIC
REPLACEMENT PROCEDURE
1. Carefully position the new choke assembly(s) onto the choppers and chokes bracket.
2. Using a 1/2" socket and a 1/2" open-end wrench, attach the two bolts, nuts and flat washers
securing the choke assembly to the choppers and chokes bracket.
3. Carefully apply a thin coating to the mating surfaces of the choke leads and the choke terminals.
See Wiring Diagram.
4. Using a 1/2" socket and a 1/2" open-end wrench, attach the nut, bolt, lock washer and flat washer
securing leads to each terminal of the choke assembly being replaced. See Wiring Diagram. Repeat
this step for the other choke assembly, if necessary.
5. Carefully position the choppers and chokes bracket into the machine.
6. Using a 1/2" nutdriver, attach the four screws securing the choppers and chokes bracket to the
machine.
7. Connect plug J3 to the weld control board. See Wiring Diagram.
8. Using a 1/2" socket and a 1/2" open-end wrench, attach the two bolts, nuts, lock washers and four
flat washers securing leads B2/B5, B2/B5 to the positive terminal of the output rectifier bridge and
leads B1/B4 and B1/B4 to the negative terminal of the output rectifier bridge. See Wiring Diagram.
9. Perform the Front Panel Replacement Procedure.
10. Perform the Case Cover Replacement
11. Perform the Retest After Repair Procedure.
Figure F.42 – Output rectifier bridge lead and terminal locations
Procedure.
Fleet™ 650 Service Manual
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