Westerbeke 4.0Kw BCDB 50Hz Manual de instalación descargar pdf (Pagina 30)

STARTER

MOTOR

DESCRIPTION

The

starting

system

includes

the

battery,

starter

motor,

solenoid,

and

starter

button.

When

the

starter

button

on

the

instrument

panel

is

depressed,

current

flows

and

energizes

the

starter's

solenoid

coil.

The

energized

coil

becomes

an

electromagnet,

which

pulls

the

plunger

into

the

coil,

and

closes

a

set

of

contacts

which

allow

high

current

to

reach

the

starter

motor.

At

the

same

time,

the

plunger

also

serves

to

push

that

starter

pillion

to

mesh

with

tlle

teeth

on

the

flywheel.

To

prevent

damage

to

the

starter

motor

when

the

engine

staJ.i:s,

tile

puuon

gear

incorporates

an

over-rumung

(one-way)

clutch

wluch

is

splined

to

the

starter

anmture

shaft.

The

rotation

of

tile

rulming

engine

may

speed

the

rotation

of

the

pinion

but

not

the

stalter

motor

itself

Once

the

started

button

is

released,

the

cunent

flow

ceases,

stop-

ping

the

activation

of

the

solenoid.

The

plunger

is

pulled

out

of

contact

with

the

battely-to-stari

cables

by

a

coil

spring,

and

the

flow

of

electricity

is

interrupted

to

the

starter.

This

weakens

the

magnetic

fields

and

tile

starter

ceases

its

rotation.

As

the

solenoid

plunger

is

released,

its

movement

also

pulls

the

stalter

drive

gear

from

its

engagement

with

tile

engine

flywheel.

MOTOR

---t<~~

TYPICAL

STARTER

MOTOR

TROUBLESHOOTING

Prior

to

teSrulg,

make

certain

the

ships

batteries

are

at

full

charge

and

that

tile

starting

system

wiring

connections

(temunals)

are

clean

and

tight.

Pay

particular

attention

to

the

ground

wU'e

connections

on

the

engine

block.

To

check

tile

wiring,

try

cranking

the

starter

for

a

few

seconds,

never

more

than

10

seconds

at

a

tllne,

then

run

your

hand

along

tile

wires

and

tennulals

looking

for

wann

spots

that

uldicate

resistance.

Repair

or

replace

any

trouble

spots.

Using

a

multimeter,

test

tile

voltage

between

tile

positive

temullal

stud

on

the

stalt

solenoid

and

the

engine

block

(ground).

If

you

read

12

volts,

the starter

is

faulty.

IGNITION

TERMINAL

TO

CONTROL

PANEL

.,..-/

(+)

POSITIVE

~

TERMINAL

~----.(M)

TERMINAL

I,

. n

To

test

the

igffition

circuit,

locate

tile

ignition(s)

tenninal

(it

is

one

of

the

small

temunal

studs

and

is

wired

to

the

ignition

circuit).

Use

a

screwdriver,

don't

touch

the

blade,

to

jump

from

that

ignition

temmlal

to

tile

positive

battery

comJectioJ1

tenninal

on

the

solenoid.

If

tbe starter cranks, tbe fault

lies

with

the

ignition circuit.

If

the

solenoid

clicks

but nothing

else

happens,

the

starter

motor

is

probably

faulty.

IGNITION

TERMINAL

TO

CONTROL

PANEL

-(+)

POSITIVE

TERMINAL

~

If

nothing at

all

happens the solenoid isn't getting current.

Check

tile

battery

isolation

switch

and

inspect

the

wiring

connections.

It

is

also

possible

tilat

the

solenoid

is

defective.

A

WARNING:

There

will

be

arching

and

sparks

will

fly

when

jumping

terminals.

Be

certain

the

engine

space

is

free

of

potentially

explosive

fumes,

especially

gasoline.

Engines & Generators

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