Installation manual

ManualsBrandsWesterbeke ManualsAutomotive11A-1

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE

recommends

that

the

following

engine

adjustments

be

peiformed

by

a

competent

engine

mechanic.

The

information

below

is

provided

to

assist

the

mechanic.

Tightness

of

the

Valve

Seat

Apply

a

pressure

of

2600

Iblin

2

(182

kglcm2)

and

check

if

fuel

leaks

from

the

injection

nozzle

holes.

If

fuel

leaks,

disassemble,

wash

and

recheck

the

injector

nozzle

or

replace

it

CHECKING

THE

TIGHTNESS

OF

THE

VALVE

SEAT

Inspecting

the

Spray

Pattern.

1. Mount the nozzle

and

nozzle holder

on

the

nozzle

tester.

2. Bleed the air in

the

nozzle line

by

pumping

the

nozzle

tester handle several times.

3. Keep

the

reading

on

the

pressure gauge of

the

nozzle

tester just below the injection starting pressure while

pumping the handle of the nozzle tester

as

quickly

as

possible so that a pulsating whistling sound

is

heard.

Check the

atorni~tion

of the fuel injected

from

the

nozzle

(see illustration).

NORMAl

FAUlTY FAUlTY

PAmAN PAmAN PAmRN

FUELIIUECTOR

SPRAY

PAnERNS

Normal Pattern:

The

fuel

is

sprayed

uniformly

and

finely

from

all

five

injection

nozzle

holes.

Faulty Pattern:

The

number

of

fuel

sprays

and

fineness

of

the

injected

fuel

is

substandard.

If

the

condition

of

the

injected

fuel

is

substandard,

disassemble,

wash

and

recheck

the

injection

nozzle

or

replace

it.

Checking

the

Nozzle

Body

and

Needle

Valve

1.

Check for damage

to

the valve seat of

the

needle valve

and

check for damage

to

other parts.

2.

Check for damage

to

the nozzle

body.

Hold

the

nozzle

body

upright

and

insert four-fifths

of

the needle valve.

Then

release the needle valve and check that it drops into

the

valve seat under

its

own weight.

Reassembly

Be

sure

to

do

the

following

when

reassembling

the-fuel

injector:

1. Tighten the nozzle body onto the nozzle holder

to

the

specified torque.

Nozzle

torque:

29 - 36

ft-Ib

(4.0 - 5.0 kg-m)

TIGHTENING

THE

NomE

BODY

ONTO

THE

NomE

HOLDER

2.

After assembling

the

fuel

injector, check the injection

starting pressure

and

the

spray pattern.

Injector Installation

The

fuel

injector

installation

sequence

is

the

reverse

of

the

removal

sequence.

Make

sure

to

include

the

following:

1.

Use

new

gaskets - do not reuse

the

old gaskets.

2.

Replace

the

copper sealing washer

for

each injector.

3. Tighten

the

fuel

injector holder bracket mounting

nuts

to

the

specified torque.

Bracket mounting nuts torque:

6 - 9

ft-Ib

(0.8

-

1.2

kg-m)

Engines & Generators

37