Exciter Rotor Removal And Replacement Procedure - Lincoln Electric Classic 300 MP Service Manual

LINCOLN ELECTRIC

EXCITER ROTOR 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 Exciter Rotor Assembly.
MATERIALS NEEDED
1/2" Nutdriver
7/16" Nutdriver
7/16" Open-End Wrench
1 5/8" Open-End Wrench
Gear Puller
Wiring Diagram
REMOVAL PROCEDURE
1. Turn off the engine on the Classic 300 MP machine.
2. Using a 1/2" nutdriver, loosen the nut securing the negative battery cable to the battery. See
Wiring Diagram.
3. Perform the Exciter Brush Removal Procedure.
4. Using a 7/16" nutdriver and a 7/16" open-end wrench, remove the two bolts, nuts, lock washers
and flat washers securing the brush holder bracket to the exciter stator frame. See Figure F.60.
5. Bend the flat washer away from the rotor locking nut.
6. Using a 1 5/8" open-end wrench, remove the rotor locking nut and washer. See Figure F.60.
7. Using a gear puller (if necessary), remove the sleeve collar. See Figure F.60. Be careful not to
damage the rotor slip ring assembly.
8. Carefully slide the rotor assembly off of the generator shaft.
9. The exciter rotor can now be replaced.
REPLACEMENT PROCEDURE
1. Carefully slide the rotor assembly onto the generator shaft.
2. Using a gear puller, attach the sleeve collar. Be careful not to damage the rotor slip ring assembly.
3. Using a 1 5/8" open-end wrench, attach the rotor locking nut and
175 ft./lbs.
4. Bend the washer down over the locking nut.
Classic® 300 MP Service Manual
washer. Torque the locking nut to
96