Westerbeke 108B Manual de instalación descargar pdf (Pagina 41)

DUAL

OUTPUT

ALTERNATORS

TROUBLESHOOTING

NOTE:

Bejore

troubleshooting,

make certain

that

the

drive

belts

are

tight

and

the

batteries

are

good

condition.

Regulator

Testing

The red "battery sensing" wire A connects to the battery, it

must always read battery voltage.

battery voltage is not

present,

trace

the

wire

for

bad

connection.

The orange

wire

S should read 0 volts with the key off, 12

volts [approximately] with the key on.

the readings are

incorrect,

trace

the

wire

for

bad

connection.

The blue wire F supplies current to the alternator fields, its

voltage

will

vary depending on the battery charge or actual

load/rpm. The readings can vary from 4 to

volts with the

key

on,

0 volts with the key off.

KEY

•

VOLTAGE

REGULATOR

DEFECTIVE

KEY

OFF·

BATIERY

VOLTAGE

REGULATOR

DEFECTIVE

REGULATOR

TEST

POINTS

AND

PROPER

VOLTAGE

Terminal/Color

Ignition

Engine

Running

Brown

volts

-12

volts

14.2

volts

Red

12.6

volts

14.2

volts

Orange

volts

6-8volts

Blu.

volts

-11

volts

-12

volts

All.

Output

12.6

volts

14.2

volts

Alternator

Testing

The

regulator

functioning

properly

and

the

batteries

are

good condition.

1. Test the voltage at the alternator plug with the

engine

off-key on. The voltage at the alternator

tenninal

F and

the voltage in the plug

[blue wire F] from the regulator

should read the same.

2. Hold a screw driver close

[1/2"] to the alternator pulley.

voltage

present you should feel the magnetic field.

.not, the problem may

the brushes [worn]

the rotor

[open circuit].

3. Start the engine, at fast idle the output tenninals should

indicate 14.2 volts [no load]. A reading

12.6 would

indicate the alternator is not performing properly.

Apply a load such

an electric bilge pump, the voltage

should maintain at least 13.8 volts.

volts

less

indicates the alternator is faulty.

NOTES:

When

the

engine

first

started,

takes

a few

moments

jar

the

alternator

"kick in" and

take

the

load.

There

noticeable

change

the

sound

the engine and

the

RPM

gauge

will

excite.

o A slight

whine

normal

when

running

with

a full load

the

alternator.

When

the

alternator

producing

high

amperage,

will

become

very

hot.

When

replacing

the

alternator

drive

belts,

always

purchase

and

replace

dual

belts

matched

pairs.

Engines & Generators

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 61 62

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Westerbeke 108B Manual de instalación Pagina 41

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