Figure 9-1 Continued.
Figure 9-1
TM 5–6115–323–14
(2) Inspect stator housing for cracks, distor-
tion, damaged threads, elongated holes, a worn
bearing seat, and other damage.
(3) Inspect the installed stators for signs of
burning, overheating, broken insulation and other
damage.
(4) Inspect the positive and negative heat
sinks for cracks, burned areas, and other damage.
(5) Inspect the DC unit alternator rotor for a
scored or burned bearing seat, for distortion, and
other damage.
(6) Inspect the bearing for signs of heat,
rough spots when burned, fatigue or chipping, and
other damage.
(7) Replace all defective parts.
d. Assembly. Refer to figure 9-2 and assemble
the generator.
e. Installation.
(1) Refer to figure 6-5 and install the genera-
tor adapter on the engine.
(2) Position the generator rotor (27, fig. 9-2)
on the crankshaft of the engine.
(3) Refer to figure 6-4 and install the genera-
tor stator housing.
(4) Refer to figure 6-3 and install the genera-
tor fan.
(5) Install the generator end cover.
(6) Install the fuel tank and bracket (para 4-
22 and 4-23).
(7) Install the control box (para 6-3).
f. Test.
(1) Start the generator set and allow it to
warm up.
(2) Observe the voltmeter on the front of the
control box. If the exciter or stator is defective
there will be no voltage reading on the set voltme-
ter.
(3) If no voltage appears on the set voltmeter,
stop the set and disconnect terminals 3, 4, 5, and 6
at voltage regulator. With a multimeter, measure
resistance across disconnected leads F1 and F2
(wires from terminals 5 and 6 of voltage regulator)
to exciter, and leads T1 and T2 (wires from termi-
nals 3 and 4 of voltage regulator) to stator. These
resistances should be 215 ohms ± 10% and 8.2
ohms ± 10%, respectively.
(4) If resistance readings do not meet specifi-
cations, replace the stator. If resistance readings
are as prescribed, replace the rotor.
9–3
