Figure 11-12. Installing Exciter Armature and Rotating Rectifier Assembly

Figure 11-11. Removing Exciter Armature and Rotating Rectifier Assembly

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 Figure 11-12. Installing Exciter Armature and Rotating Rectifier Assembly (e) Replace cover (30) with screws (26 and 28), washers (29), and nuts (27). 11-7. PERMANENT MAGNET ROTOR ASSEMBLY. The permanent magnets and soft pale tips of the revolving field are permanently attached to a steel hub by nonmagnetic stainless steel bolts. CAUTION No attempt should be made to unbolt and separate rotorparts. This will alter permanent magnets, reducing their strength. Do not expose rotor to excessive heat or mechanical shock. a. Inspection. Inspect the rotor for metal chips attracted to the magnets, accumulation of dust, and check security of bolts holding each magnet to hub. b. Testing. No testing of the PMG rotor is required. c. Replacement. (1) Removal. (a) Remove cover (30, figure 11-3) by removing screws 26 and 28), washer (29), and nut (27). WARNING USE EXTREME CARE WHEN REMOVING ROTOR TO PREVENT INJURY TO HANDS DUE TO MAGNETIC ATTRACTION BETWEEN THE PMG ROTOR AND THE PMG STATOR OR GENERATOR SHAFT. (b) Remove bolt (34), washer (35), and pin (36) from PMG rotor (37). Carefully remove PMG rotor (37) from generator shaft. NOTE If the PMG rotor is to remain disassembled for an extended period, install a keeper on the rotor. Use a band of iron or steel. (2) Replacement. (a) Remove iron band (if used) from PMG rotor (37).Carefully attach PMG rotor (37) to generator shaft with pin (36), bolt (34), and washer (35). (b) Replace cover (30) with screws (26 and 28), washers (29), and nuts (27). d. Repair. Since there are no bearings, brushes, or slip rings and no semiconductor devices, there is no repair of the PMG rotor. NOTE No attempt should be made to unbolt and separate the parts of the rotor. Breaking the magnetic circuit would alter the permanent magnets, reducing their strength. Reassembling the rotor would not restore the magnetism to its prior state. e. Rebuild. Since there are no bearings, brushes, or slip rings and no semiconductor devices, there is no rebuild of the PMG rotor. 11-23

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