ARMY TM 9-6115-672-14
AIR FORCE TO 35C2-3-444-32
MARINE CORPS TM 09244A/09245A-14
5-53
(5)
Install rear housing panel. Refer to paragraph 4.7.5.
(6)
Connect negative battery cable to battery, and close BATTERY ACCESS door.
5.10.4 Exciter Stator.
a. Inspection.
(1)
Shut down generator set, paragraph 2.11.2. Allow generator to cool to ambient temperature.
(2)
Open BATTERY ACCESS door (Figure 1-2), and disconnect negative battery cable.
(3)
Open output box access door (Figure 1-2), visually inspect generator assembly for obvious
damage. Check exciter field leads for broken wires and signs of wear.
b. Testing.
(1)
Shut down generator set, paragraph 2.11.2. Allow generator to cool to ambient temperature.
Inspect Exciter Stator per paragraph 5.10.4 a.
(2)
Open output box access door (Figure 1-2), and disconnect exciter field leads F1 and F2 from
terminals 1 and 2 of terminal board TB8. Refer to Schematic FO-1.
(3)
Set multimeter for ohms, and connect between disconnected exciter field leads. Multimeter
reading should be as shown in Table 5-2.
(4)
Multimeter reading other than in Table 5-2 indicates open or shorted windings, and exciter stator
must be replaced.
TABLE 5-2. GENERATOR RESISTANCE VALUES AT 25° C (77° F)
Resistance
Component
MEP-806B
MEP-816B
Exciter Stator
Between 24.85 & 33.61 ohms
Between 24.7301 & 33.4583 ohms
Exciter Rotor
Between 0.202 & 0.274 ohms
Between 0.2082 & 0.2816 ohms
Generator Rotor
Between 0.52 & 0.70 ohms
Between 1.0835 & 1.4659 ohms
Generator Stator
Between 0.040 & 0.054 ohms
Between 0.015 & 0.0202 ohms
(5)
Connect multimeter between each exciter field lead and generator frame in turn.
(6)
Multimeter reading of less than infinity indicates defective ground insulation, and exciter stator
must be replaced.
(7)
Connect exciter field leads to terminals 1 and 2 of terminal board TB8 (Refer to Schematic FO-
1). Close output box access door (Figure 1-2).
(8)
Connect negative battery cable to battery, and close BATTERY ACCESS door.
c. Replacement.
(1)
Shut down generator set, paragraph 2.11.2.
(2)
Open BATTERY ACCESS door (Figure 1-2), and disconnect negative battery cable.
(3)
Remove rear housing panel. Refer to paragraph 4.7.5.
