TM 5-3810-306-34
TESTING:
1. BENCH TEST ALTERNATOR.
b. Slowly increase alternator speed and
observe voltage.
NOTE
c. If voltage is uncontrolled with speed and
increases above 31.0 volts, test voltage
Battery used for bench check must
regulator and recheck field winding.
be fully charged.
d. If voltage is below 31.0 volts, connect
carbon pile as shown.
ohms at 6 watts), alternator, and fully
charged battery as shown.
Do not
e. Operate alternator at moderate speed and
connect carbon pile at this time.
adjust carbon pile as required to obtain
maximum current output.
f. If output is within 10 amperes of 65
amperes, then alternator is good.
g. If output is not within 10 amperes of 65
amperes keep battery loaded with carbon
pile and insert screwdriver into end frame
hole to ground tab to end frame. Note that
tab is within 3/4-inch of casting surface,
therefore, do not force the screwdriver
deeper than 1-inch into end frame.
6-8
