Choke Removal And Replacement Procedure - Lincoln Electric Fleet 400 Service Manual

LINCOLN ELECTRIC

CHOKE REMOVAL AND REPLACEMENT PROCEDURE

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized
repairs performed on this equipment may result in danger to the technician or machine operator and will
invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety
notes and precautions detailed throughout this manual. If for any reason you do not understand the test
procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department
for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This procedure will aid the technician in the removal and replacement of the Choke.
MATERIALS NEEDED
1/2" Socket
1/2" Open-End Wrench
1/2" Nutdriver
Penetrox Heat Sink Compound (Lincoln Part #T12837-1)
Wiring Diagram
REMOVAL PROCEDURE
1. Turn off the engine on the Fleet 400 machine.
2. Perform the Case Cover Removal Procedure.
3. Perform the Chopper Module Capacitor Discharge Procedure.
4. Perform the Front Panel Removal Procedure.
5. Using a 1/2" socket and a 1/2" open-end wrench, remove the nut, bolt, lock washer and flat washer
securing leads to each terminal of the choke. See Figure F.39. See Wiring Diagram.
6. Using a 1/2" socket and a 1/2" open-end wrench, remove the two bolts, nuts and flat washers
securing the choke assembly to the chopper and choke bracket. See Figure F.39.
7. The choke assembly
REPLACEMENT PROCEDURE
1. Carefully position the new choke assembly onto the chopper and choke 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 chopper and choke bracket.
3. Carefully apply a thin coating of Penetrox heat sink compound 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. See Wiring Diagram.
5. Perform the Front Panel Replacement Procedure.
6. Perform the Case Cover Replacement
can now be removed and replaced.
Procedure.
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