TM 9-4940-549-14&P
ammeter and voltmeter.
(c) When field rheostat reaches zero ohms, ammeter should
indicate 3.0 to 3.5 amperes with voltmeter indicating 24
Vdc.
(d) If current is not as specified, check for poor connections
and inadequate brush contact.
Conduct alternator output and voltage protector test as follows:
(9)
Install alternator in test circuit shown in figure 7-15.
(a)
NOTE
If alternator is not installed for this
test, a means of rotating the alternator
at 2,000 to 3,000 rpm must be provided.
Adjust the drive device to provide 2,500 rpm.
(b)
Nominal voltage should be
Note the voltmeter indication.
(c)
28
If voltage is not specified, adjust the volt age regulator
(d)
rheostat on the alternator rear cover.
Close switch (S2) and put carbon pile load on batteries.
(e)
(f)
Check ammeter and voltmeter indications. Nominal current
output should be 20-25 amperes with charging voltage ex-
ceeding 25 Vdc.
Open switch (S2) immediately after cur-
rent test to avoid discharging the bat-
teries.
If nominal voltage cannot be obtained, disassemble alter-
(g)
nator and correct difficulty.
Remove alternator from test circuit, remove rear cover and
(h)
disconnect test leads.
Refer to figure 7-2 and install the alternator.
f.
Installation.
COOLANT TEMPERATURE TRANSMITTER.
Removal.
a.
(1) Drain coolant from the radiator.
