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 TM 55-1905-221-14-1
4-28.
One 70-amp, 24-volt alternator is belt driven from each inboard engine crankshaft pulley. The electrical circuit of
the alternator uses six silicon diodes in a full wave rectifier circuit. Since the diodes will pass current from the alternator
to the battery or load but will not pass current from the battery to the alternator, the alternator does not require the use of
a cutout relay. A voltage regulator is the only control required.
This task covers:
a. Inspection
b. Test
c. Service
INITIAL SETUP:
Equipment
Condition
Paragraph
Condition Description
Test Equipment
Engine Operating
Battery Disconnected
Hydrometer
Multimeter (TS-352B/U
or equiv) 6625-00-553-0142
Special Environmental Conditions
Series Resistor
Field Reheostat; DC Ammeter,
NONE
0-10 Amps, 0-100 Amps
Carbon Pile
DC Test Lamp, 12 or 24 Volts
General Safety Instructions
Jumper Leads 2, 4, 6, and 10
Feet in Length with Alligator
Observe CAUTIONS prior to testing
Clip
and WARNINGS prior to servicing.
Tools and Special Tools
Troubleshooting Reference
General Mechanic Tool Kit
NONE
Material/Parts
Approximate Time Required (minutes)
Detergent
Inspection
30
Test
30
Service
30
Personnel Required
References
Operator-Crew
(MOS 61B & C)
4-99
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