ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
g. Install main stator, paragraph 4.23.3.
h. Install generator assembly, paragraph 4.16.2.
4.21 EXCITER ROTOR MEP-804A).
4.21.1 Testing.
a. Shut down generator set. Allow generator to cool to ambient temperature.
b. Open battery access door and disconnect negative battery cable.
c .
d.
e.
f .
g.
h.
i.
j.
Remove generator set housing rear panel, paragraph 2.18.1.
Remove generator end bell, paragraph 4.18.1.
Tag and disconnect exciter rotor leads (3 places) from rotating rectifier by removing screws (3, FIGURE 4-9).
Connect resistance bridge, between two exciter rotor leads and note resistance reading. Continue this procedure
until readings are noted for each combination of leads (i.e., 1 and 2, 1 and 3, and 2 and 3).
Resistance readings should be as shown in TABLE 4-3 for each combination of leads. Readings other than in
TABLE 4-3, indicate open or shorted windings and exciter rotor must be replaced.
Set multimeter for ohms and connect between each exciter rotor lead and generator housing in turn.
Multimeter reading of less than infinity indicates defective ground insulation and exciter rotor must be replaced.
Connect exciter rotor leads to rotating rectifier with screws (3, FIGURE 4-9) and remove tags.
k. Install end bell, paragraph 4.18.2.
l. Install generator set housing rear panel, paragraph 2.18.4.
m. Connect negative battery cable and close battery access door.
4.21.2 Removal.
a. Shut down generator set.
b. Open battery access door and disconnect negative battery cable.
c. Remove generator set housing rear panel, paragraph 2.18.1.
d. Remove generator end bell and main bearing, paragraph 4.18.1.
e. Remove rotating rectifier, paragraph 4.19.1.
WARNING
Use protective gloves when handling heated rectifier hub (12) to pre-
vent personal injury.
N O T E
Rectifier hub (12) is heat shrunk onto rotor assembly (23) shaft and will
require the use of heat to remove.
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