TM 5-6115-465-34
TO 35C2-3-446-2
NAVFAC P-8-625-34
TM06858B/06859D-34
(c) When field rheostat reaches zero
(f) With the alternator rotating at 2500
ohms, ammeter should indicate 3.0 to 3.5 amperes
RPM the voltmeter should indicate 24 to 28 volts and
with voltmeter indicating 24 Vdc.
the ammeter should indicate 32 to 35 amperes.
(d) If current is not as specified, check
(g) If the alternator tests satisfactorily,
for poor connections and inadequate brush contact.
this indicates that the voltage regulator was faulty.
(h) If the alternator does not test satis-
protector test as follows:
factorily, this indicates that the voltage regulator is
good and the trouble is in the alternator.
in figure 3-13.
(i) If the regulator is faulty, remove the
jumper (figure 3-11) and install a new regulator and
cover assembly using the tagged leads on the old cover
assembly as a guide when making connections.
NOTE
(9) Conduct field current test as follows:
If alternator is not installed on generator
set for this test, a means of rotating the
CAUTION
alternator at 2,000 to 3, 000 RPM must be
provided.
Rheostat must be set in maximum resis -
(b) Adjust the drive device to provide 2500
tance position to protect the ammeter in
RPM.
the event the field circuit is short circuited.
(c) Note the voltmeter indication. Nominal
(a) Install alternator in test circuit as
voltage should be 28 Vdc 0.3Vdc
shown in figure 3-12.
(b) Slowly reduce field rheostat resis-
(d) If voltage is not as specified, adjust the
voltage regulator rheostat on the alternator rear cover.
Figure 3-13.
Output and Voltage Protector Test
3-17
