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

PERMANENT MAGNET STATOR AND FRAME ASSEMBLY

Figure 11-12. Installing 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 (g) Remove screws (31) and washers (32) holding the PMG stator frame, and screws (54) and washers (55) supporting the exciter field (56) to the endbell (85). (2) Replacement. Replace as follows: (a) Install exciter field (56) onto endbell (85) with screws (54) and washers (55). Connect exciter field leads to reconnection box. Remove tags from leads. Figure 11-11. Removing Exciter Armature and Rotating Rectifier Assembly (b) Install exciter rotor (38) on generator shaft as follows: (1) If the "slip-fit" exciter armature and rotating assembly will not easily slide onto the shaft by hand, install with a fixture as shown in figure 11-12. NOTE Usually the exciter armature will slide onto the shaft most of the way by hand. The exciter armature can usually be "seated" by tapping lightly on the sleeve with a soft rubber or fiber mallet. Make certain mallet hits only the sleeve, not rectifier assembly or armature windings CAUTION Make certain the key is in place in the generator shaft and the keyway in the exciter armature sleeve is aligned with key before starting the exciter armature onto generator shaft. (2) Refer to figure 11-12 for fixture setup. Start exciter armature and rectifier bridge on shaft. Thread stud in rotor shaft. Install large diameter washers on stud and start stud nut. Pull exciter armature and rotating rectifier onto shaft by turning stud nut. (3) Install exciter armature retaining bolt (34, figure 11-3), washer (35), and pin (36). Connect alternator field leads to positive (+) and negative (-) terminals located on the heat sinks of the rotating rectifier assembly. Install exciter cover (30) with screws (26 and 28) washers (29), and nuts (27). (c) Using a crane or hoist, install the PMG stator (33) over exciter assembly onto endbell (85) with screws (31) and washers (32). Connect PMG stator leads to reconnection assembly. Remove tags from leads. (d) Remove iron band (if used) from PMG rotor assembly (37). Carefully attach PMG rotor (37), bolt (34), and washer (35). 11-22

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