Westerbeke 12.0KW - 50Hz EDT Installation Manual download pdf (Page 35)

FUEL

INJECTION

TIMING

PREPARATION

a.

Close

the

fuel shut-off

valve.

b.Disconnect

the

No.1

fuel injection pipe

from

the

cylinder head

and

injection

pump.

c.

Remove

No.1

delivery

valve

holder

from

the

injection

pump.

Remove

the

delivery valve and spring

from

the

holder.

Restore

the

delivery valve holder only

to

the

injection

pump.

d. Connect

the

fuel

injection pipe

to

the

injection

pump.

e.

Hold

the

speed control lever

in

the

low

speed position.

(Generator)

remove

the

fuel

shut-off solenoid.

INSPECTION

[Fuel

Flow

Method]

a.

Open

the

fuel

shut-off

valve.

Thm

the

hey

switch

to

the

ON

position and press preheat.

NOTE:

Fuel

will

come

from

the

injection

pipe

with

high

pressure

when

the

starter switch key

is

turned

to

ON

position

if

the

engine

is

equipped

with

an

electric fuel

pump.

Direct

fuel flow

into

the

container.

b. Slowly tum

the

crankshaft clockwise, looking

at

the

open

end of

the

injection

pipe.

The instant

fuel

stops

coming

out

is

the

fuel injection

timing.

NOTE:

Tum

the

crankshaft

in

reverse

direction

just a

little

and

do

step

b

again

to

verify

the

injection

timing.

c.

The

fuel

injection timing

is

correct if

the

IT

mark

on

the

crankshaft pulley

is

aligned with

the

mark

on

the

timing

gear

case

when

fuel

stops from

the

injection

pipe.

FUEL

INJECTION

TIMING:

BTDC

17°

(STANDARD)

~~I:lt~

X~\

~

,

~

~r~~~-\

~

/~

r~

.

.1·

/'-,1

1)

....

1'1

k

FUEL

FLOWS

In

the

fuel

flow

method,

the

delivery valve has

to

be

removed.

As

a result,

there

is

a

good

chance for dirt particles

to

get

inside

the

fuel

injection

pump.

In

this

alternate

method,

however,

it

is

not necessary

to

remove

the

delivery

valve.

a. Disconnect

No.1

fuel

injection pipe at

the

fuel

injection nozzle (cylinder

head).

b.Prime

the

fuel system.

c.

Slowly

tum

the

crankshaft clockwise until

fuel

just

swells

at

the

free

end

of

the

injection pipe

and,

at

that

instant, check

the

position of

the

IT

mark

with

respect

to

the

mark

on

the

gear

case.

This

timing

is

approximately 1

0

retarded.

Take

this 1

0

retardation

into account

when

making

a

shim

adjustment.

ADJUSTMENT

a.

If

the

fuel

injection

timing

is

incorrect, change

the

thickness of shims under

the

fuel

injection

pump.

An

increase or decrease of the

shims

by

O.lmm

(0.004

in)

will

vary

the

timing

by

1°.

b.Increase

the

thickness of the

shims

to

retard

the

timing

or decrease it to advance the

timing.

ADJUSTMENT

RANGE:

STANDARD

±

1.5

0

Four kinds of shims

are

available

in

thicknesses

0.2mm

(0.0079

in),

O.3mm

(0.0118

in),

OAmm

(0.0157

in)

and

0.8mm

(0.0315

in).

These

shims

have

no

identification, measure

the

thickness of

each

shim

with

calipers before

using

it.

A

CAUTION:

App/y

sea/ant

to

both

faces

of

each

shim

to

prevent

oi//eaks.

c.

Mter

the

timing has

been

adjusted,

make

sure

it

is

correct.

d.Close

the

fuel

filter

valve

and

restore

the

delivery

valve

and injection pipe

to

the

original state.

TDCMARK

ANGLE

BY

WHICH

FUEL

INJECTION

TIMING

~

lS~w

1'1')o...c--23°

ANGLE

BY

WHICH

FUEL

INJECTION

TIMING

IS

ADVANCED

Engines & Generators

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