TM 5-4310-452-14
4-36. ALTERNATOR REPLACEMENT (Con't).
VOLTAGE REGULATOR TEST (SHORTED)
1.
Connect multimeter negative lead to alternator
ground terminal (7) and positive lead to positive
output terminal (5).
NOTE
When the engine is running, the
engine oil pressure switch is closed.
2. Start and idle engine with no electrical loads at 1400
rpm until multimeter voltage reading stabilizes at the
regulator high end setting (see paragraph 2-12).
3. Check voltage reading. if voltage reading exceeds
30 volts, the voltage regulator is shorted. Replace
voltage regulator (see paragraph 4-38).
ALTERNATOR OUTPUT TEST
1. Connect multimeter negative lead to alternator
ground terminal (7) and positive lead to positive
output terminal (5).
NOTE
When engine is running, the engine oil pressure switch is closed.
2. Start and idle engine at 1400 rpm (see paragraph 2-12).
NOTE
Voltage reading may vary a few tenths of a volt, higher or lower, due to ambient temperature
variations.
3.
Check multimeter for nominal system output voltage reading between 27.5-29 volts.
4.
if the output voltage reading is not within the proper range, replace alternator.
b.
REMOVAL
1.
Remove alternator belt (see paragraph 4-37).
2.
Disconnect wire at connector (26).
3.
Remove 2 nuts (21) and lockwashers (20) from terminals and remove 3 wire leads. Discard lockwashers.
4.
Remove nut (23) and lockwasher (22) from terminal and remove 2 wire leads. Discard lockwasher.
5.
Remove locknut (19) and washer (18) from terminal and remove wire lead. Discard locknut.
TA505463
4-74
