TM 5-3805-248-23-2
ALTERNATOR (BOSCH) REPAIR - CONTINUED
0359 00
TESTING - CONTINUED
CAUTION
Observe correct polarity when connecting voltmeter to avoid damage to equipment.
3.
Set load current to 5 amps by adjusting carbon pile at a
test speed of 5,000 RPM. If after one minute, voltage
does not read between 27 volts and 28.5 volts, replace
regulator (16).
4.
Test field coil for opens or shorts by connecting ohm-
meter to two field coil wires (17). Replace field coil if
reading is not 7 through 9 ohms.
TO VARIABLE
MOTOR AND
IL - LOAD CURRENT
CARBON
IF - FIELD CURRENT
PILE
ONLY CONNECT IN-
DICATOR LAMP IF
TEST GENERATOR HAS
BEEN PREVIOUSLY
DISASSEMBLED.
394-1369
5.
Test field coil for shorts to frame by connecting ohm-
9
17
meter to the (B-) terminal and then to each of the two
(R)
field coil wires (17). If readings are not high, field coil
TERMINAL
is shorting to frame and replacement is necessary.
16
(B-)
TERMINAL
(D+) TERMINAL
(B+) TERMINAL
394-1368
0359 00-6
