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TROUBLESHOOTING & REPAIR | |||
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| STATOR/ROTOR REMOVAL AND REPLACEMENT (continued) |
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Replacing the Stator
1. Examine the stator frame assembly. Be sure the wiring, coils, mounting flange and bear- ing seat are clean and in good condition. Check the engine mounting flange to be sure it is clean and free of nicks, burrs, or anything that may interfere with the seating or align- ment of the stator frame assembly.
NOTE: If the stator had been removed due to a bearing or tolerance ring failure, the bearing seat in the stator frame assembly must be checked for a possible oversize condition before reassembly. 2. Apply a thin film of grease to the tolerance
ring and insert it into the bearing seat cavity of the stator frame assembly.
3. Use the hoist, along with lifting straps or chains to lift the stator frame assembly. Carefully align the stator to the rotor and slide the stator frame over the rotor. Be very care- ful not to damage either the stator or rotor.
4. Align the rotor shaft bearing to the tolerance ring; also align the screw holes in the mount- ing flange. Insert the 8 screws with lock washers through he stator flange and into the engine mounting flange. It may be necessary to tap the stator with a mallet to partially seat the bearing in order to get the screws started.
5. Begin tightening the screws evenly to draw the stator onto the engine mounting flange. (Bolts, stator frame to engine: 20 to 22
6.Check the air gap between the stator and the rotor. A .017” thick, 1/2” wide feeler gauge should pass between the stator and rotor.
7.Install the flat washer and then the blower fan on the rotor shaft. The fan should be hand tightened only.
8.Attach the hoist to the lift bale to support the engine and stator assembly. Remove the support blocks, remove the screws from the engine support brackets and carefully rotate the engine and generator back to its original position.
9.Make sure all of the wiring is routed correct- ly, and replace the fasteners securing the engine and generator.
10.Reverse the above procedures to reassem- ble the machine.
11.Reconnect all wiring and replace any cable ties that had been removed.
12.Refill the engine cooling system with the coolant that was drained earlier, or with a 50/50 mix of permanent type antifreeze- coolant. See the engine operatorʼs manual for more detailed information.
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