MAC TOOLS MW250 Instrucciones de operaciones descargar pdf (Pagina 136)

100

101

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

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MAC TOOLS MW250 Instrucciones de operaciones Pagina 136

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MAC TOOLS MW250 Instrucciones de operaciones Pagina 136

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