TM 9-3431-254-14&P
YB-69 ALTERNATOR
Engine Model V-465D
5PECIFICATIONS
VOLTS - 12
VENTILATED - Yes
RATED OUTPUT - 37 Amperes
BRUSHES - 2
CONTROL - Voltage Regulator
ROTATION - Clockwise at drive end
LUBRICATION - Bearings are pre-lubricated. No additional lubrication necessary.
PRECAUTIONS:
Observe proper polarity when installing battery; negative
Do Not, operate engine with battery disconnected, or dis-
battery terminal must be grounded. Reverse polarity will
connect the alternator output lead while the alternator is
destroy the rectifier diodes in alternator.
operating, as damping effect of the battery will be lost.
The voltage will rise to an extreme value and permanent
AS a precautionary measure, disconnect ground battery
damage to the regulator may occur.
terminal when charging battery in vehicle. Connecting
charger in reverse will destroy, the rectifier diodes in the
Do Not, disconnect the voltage regulator while the alterna-
tor is operating, because the large voltage transient that
occurs when disconnection takes place may damage the
Do Not, under any circumstances, short the field terminal
reguIator.
of the alternator to ground, as permanent damage to the
regulator may occur.
Caution: Output wires from Alternator to Ammeter, and from
Do Not, remove the alternator from the vehicle without first
of sufficient size for charging 37 amps. Use No. 10 gage
disconnecting the grounded battery cable.
stranded wire, or larger.
FIG. B-104. WIRING DIAGRAM
B-77
