S-90
03-M-DI Series, WSM
DIESEL ENGINE
(2) Alternator
(Precaution when checking)
• If disconnect the
B
terminal or coupler, engine will stop by emergency device.
• Do not directory connect the
L
terminal with the
B
terminal. Otherwise the three exciting diodes may be damaged.
When connecting the
L
terminal, insert a 3.4 W lamp between the
L
and
B
terminals.
• Always use a full charged battery.
• Be careful to observe the proper polarity of the battery. Never install the battery in the wrong direction.
• Never disconnect the battery while the alternator is operating.
NOTE
Q
• Check the alternator with alternator test bench.
Regulating Voltage
1. Make the connections as shown in the figure, and turn on switch
SW1.
2. Increase the alternator speed to 5000
min
-1
(rpm).
3. Turn on switch
SW2
. Adjust load resistance
R
so that the
ammeter shows 10 A.
4. Check that the voltage reading on the voltmeter is within the
factory specifications.
W1150547
No-load Characteristics
1. Make the connection as shown in the figure, and turn on switch
SW1
.
2. Increase the alternator speed so that the pointer of the ammeter
swings to the plus side.
3. Turn on switch
SW1
to decrease the speed, and read the speed
at witch the voltage is equal to the factory specifications.
4. The speed must be below the factory specifications.
W1150876
Output Characteristics
1. Make the connection as shown in the figure, and turn on switch
SW1
and
SW2
.
2. Increase the alternator speed while adjusting the load resistance
so that the voltage complies with the factory specifications.
3. Read the speed at which the current is equal to the factory
specifications.
4. The speed must be below the factory specifications.
5. Decrease the speed so that the current approaches zero, the turn
off switches
SW1
and
SW2
.
W1151013
Regulating voltage
Factory spec.
14.2 to 14.8 V
No-load characteristics
Factory spec.
1150 min
-1
(rpm) or less at
13.5 V
Output characteristics
Factory spec.
40 A or more at 13.5 V,
5000 min
-1
(rpm)
KiSC issued 10, 2009 A
