ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
4.30.2 Testing.
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4.30.3
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Carefully remove main rotor (29) and attached components from generator housing (10).
Remove main bearing, paragraph 4.26.1.
Remove rotating rectifier, paragraph 4.27.1.
Remove exciter rotor, paragraph 4.29.1.
Using bearing puller, remove drive hub (27) and key (28) from main rotor shaft (9).
Remove bolts (30), nuts (31), and fan halves (32) from main rotor shaft (9).
Shut down generator set. Allow generator to cool to ambient temperature.
Open battery access door and disconnect negative battery cable.
Remove generator set housing rear panel, paragraph 2.18.1.
Remove generator end bell plates and screens, paragraph 4.26.1, step d.
NOTE
It will be necessary to bar (turn) engine in order to position a specific
area of the rotating rectifier at one of the end bell access holes.
Tag and disconnect main rotor leads (2 places) from rotating rectifier by removing screws (1, FIGURE 4-13) and
Iockwashers (2).
Set multimeter for ohms and connect, between disconnected main rotor leads. Multimeter reading should be as
shown in TABLE 4-3.
Reading other than in TABLE 4-3, indicates shorted or open windings and main rotor must be replaced.
Connect multimeter between each main rotor lead and exciter stator mounting bolt in turn.
Multimeter reading of less than infinity indicates defective ground insulation and main rotor must be replaced.
Connect main rotor leads to rotating rectifier with Iockwashers (2, FIGURE 4-13) and nuts (1).
Install generator end bell plates and screens, paragraph 4.26.2, step e.
Install generator set housing rear panel, paragraph 2.18.4.
Connect negative battery cable and close battery access door.
Installation.
Place key (28, FIGURE 4-1 5) on main rotor shaft (9) and press drive hub (27) over key (28) and onto shaft (9).
N O TE
Insure gap between fan halves (32) are equal from side-to-side.
Install fan halves (32) onto shaft (9) with bolts (30) and nuts (31).
Install exciter rotor, paragraph 4.29.3.
Install rotating rectifier, paragraph 4.27.2.
Install main bearing, paragraph 4.26.2.
C A U T I O N
Special care must be taken installing main rotor, winding damage could
result if rotor is allowed to hit main stator.
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