TM 5-3825-213-20
Figure 50. Alternator drive belt, alternator, and rectifier, removal and installation.
be no noticeable resistance in any of
(4) Crank the engine with the engine
the circuits.
starter and observe the voltmeter.
(2) With the meter on RX 100 scale, test
The voltage should not drop below 18
from each pin to alternator fan guard.
volts. If the voltage drop exceeds this
A reading of infinite resistance (no
limit, replace or recharge the batteries
reading) should be indicated on these
and proceed with the following testing
tests. If either of the tests indicates a
instructions.
faulty cable, replace it.
(5) Start the engine (TM 5-3825-213-10).
(3) Reconnect the rectifier-to-alternator
The voltmeter reading will either return
cable. Obtain a voltage reading of
the 24-volt reading or rise to a higher
battery voltage with no load by
level. If it rises to 27.5 volts, the
connecting an auxiliary voltmeter
system is in working order. If the
between
positive
and
negative
reading rises above 28 volts or falls
terminals of the battery. The voltmeter
below 27.5 volts, the system is
should indicate 24 volts.
working but needs adjustment. Refer
84