P-8-627-34
T.O. 35C2-3-442-2
TM 5-6115-457-34
TM-07464A-35
Figure 8-5. Voltage regulator
Figure 8-6. Alternator output test
setting test
6. Shut down alternator and discon-
nect carbon pile from across batteries im-
3. Run alternator up to a speed of
mediately to prevent discharging batteries.
approximately 1500 RPM. Adjust carbon
pile by slowly applying load across battery
7. Nominal output current should be
until test ammeter indicates a 10 ampere
20 to 25 amperes at 75 F ambient. This
charging current. Allow alternator to run
current output of 20 to 25 amperes should be
at this speed for at least 5 minutes to sta-
obtained with test voltmeter indicating 26 to
bilize component temperatures.
30 volts.
8. If nominal current of 20 to 25
4. Increase variable drive speed to
amperes can not be obtained, check drive
2500 RPM. Increase carbon pile load on
belt for proper tension. If drive belt has a
battery causing alternator to deliver its
midway deflection of 9/16 to 13/16 of an
maximum current capacity indicated on test
inch, then disassemble alternator and in-
spect (para 8-16).
8-20.
INSTALLATION
5. Record maximum current ob-
Refer to Operator and Organizational
Maintenance Manual, and install the
tained. Record voltmeter reading at maxi-
alternator.
mum current condition.
Change 8 8-13
