ALTERNATOR
Alternator Components and Functions (12V / 80A)
12/05
6LY3 Service Manual
11-5
© 2007 Yanmar Marine International
ALTERNATOR COMPONENTS
AND FUNCTIONS (12V / 80A)
The alternator (Figure 11-1, (1)) creates electrical
energy and charges the battery(ies). It is installed
on the engine drive shaft housing and is operated
with twin V-belts that are driven by the engine
crankshaft. The alternator is equipped with an IC
regulator that is designed to deliver a constant
voltage throughout a wide range of engine speeds
and uses diodes to convert AC to DC.
Figure 11 -1
Figure 11-1
1–Alternator
Alternator Specifications
(1)
0006272
Part No. 119578-77210
Alternator Model L-X4447 (HITACHI)
Battery Voltage 12V
Nominal Output 12V / 80A
Polarity Negative (-) Ground
Direction of Rotation
(viewed from pulley end)
Clockwise
Weight 5.8 kg (12.7 lb)
Rated Speed 5000 rpm
Operating Speed 1200-9000 rpm
Speed for 13.5V at 20°C (68°F) 1200 rpm or less
Output Current for 13.5V 75A or more at 5000 rpm
Regulated Voltage 14.5 ± 0.3V (at 20°C (68°F), Voltage Gradient -0.01V / °C)
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