ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
e. Remove screws (3, FIGURE 4-9) securing exciter rotor leads (3 places) to rotating rectifier. Tag and remove excit-
er rotor leads.
f. Remove screws (1), tag and remove main rotor leads (2) from rotating rectifier (2 places).
g. Remove bolts (8, FIGURE 4-10), Iockwashers (9), rotating rectifier (10), and insulating plate (11) from rectifier
h. If necessary, remove clamp (8, FIGURE 4-9) from diode mounting plate assembly (5).
a. If removed, install clamp (8, FIGURE 4-9) on diode mounting plate assembly (5).
b. Install rotating rectifier (10, FIGURE 4-10) and insulating plate (11) on rectifier hub (12) with bolts (8) and lock-
c. Connect two main rotor leads (2, FIGURE 4-9) to rotating rectifier with screws (1). Remove tags.
d. Connect three exciter rotor leads (4) to rotating rectifier with screws (3). Remove tags.
e. Install main bearing and generator end bell, paragraph 4.18.2.
f. Install generator set housing rear panel, paragraph 2.18.4.
g. Connect negative battery cable. Close battery access door.
4.20 EXCITER STATOR (MEP-804A).
Shut down generator set. Allow generator to cool to ambient temperature.
Open battery access door and disconnect negative battery cable.
Open output box access door and disconnect exciter field leads F1 and F2 from terminals 1 and 2 of TB8.
Set multimeter for ohms and connect between disconnected exciter field leads. Multimeter reading should be as
shown in TABLE 4-3.
Multimeter reading other than in TABLE 4-3, indicates open or shorted windings and exciter stator must be re-
Connect multimeter between each exciter field lead and generator frame in turn.
Multimeter reading of less than infinity indicates defective ground insulation and exciter stator must be replaced.
Connect exciter field leads to terminals 1 and 2 of TB8 and close output box access door.
Connect negative battery cable and close battery access door.
a. Shut down generator set.
b. Open battery access door and disconnect negative battery cable.