Contactor Cr2 Removal And Replacement Procedure - Lincoln Electric Classic 300 MP Service Manual

LINCOLN ELECTRIC

CONTACTOR CR2 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 Contactor CR2.
MATERIALS NEEDED
9/16" Open-End Wrench
9/16" Nutdriver
5/16" Nutdriver
Slotted Screwdriver
Wiring Diagram
REMOVAL PROCEDURE
1. Turn off the engine on the Classic 300 MP machine.
2. Perform the Case Cover Removal Procedure.
3. Using a 9/16" open-end wrench and a 9/16" nutdriver, remove the nut, bolt, lock washer and three
flat washers securing each side of the CV box to the fuel tank rail (two sets). See Figure F.43. See
Wiring Diagram.
4. Using a 5/16" nutdriver, remove the thirteen screws securing the CV box support to the CV box
base. See Figure F.43.
5. Label and disconnect leads 630 and 631 from the top terminals of contactor
See Wiring Diagram.
6. Using a slotted screwdriver, remove the six screws securing the six heavy leads to terminals L1, L2,
L3, T1, T2 and T3 of contactor CR2. See
7. Using a slotted screwdriver, remove the three screws securing the contactor CR2 to the CV box
assembly. See
8. The contactor CR2 can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position new contactor CR2 into the machine.
2. Using a slotted screwdriver, attach the three screws securing the contactor CR2 to the machine.
3. Using a slotted screwdriver, attach the six screws securing the six heavy leads to terminals L1, L2, L3,
T1, T2 and T3 of contactor CR2. See Wiring Diagram.
Figure F.45.
Figure F.44. See Wiring Diagram.
Classic® 300 MP Service Manual
CR2. See Figure F.44.
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