Westerbeke BTD 10.0 KW 60Hz Installation Manual download pdf (Page 41)

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE

recommends that

the

following engine adjust-

ments

be

peiformed by a competent engine

mechanic.

The

tnformation

below

is

provided

to

assist

the

mechanic.

TESTING

ENGINE

COMPRESSION

Make certain the oil level (dipstick)

is

at

the correct

level

and

the

air intake filter

is

clean.

The

battery and starter motor

must

also be

in

good condition.

1.

Warm

the

engine

to

normal operating temperature.

2.

Move

the

control lever

to

a position for shutting off

the

fuel.

(Disconnect the wires if a

fuel

shutdown solenoid

is

used).

3. Remove all the

glow

plugs

from

the engine

and

install

the

compression gauge/adapter combination

to

the

cylin-

der

on

which the compression

is

to

be

measured.

TESTING

ENGINE

COMPRESSION

ADAPTER

~WPLUGHOlf

PRESSURE

GAUGE

4.

Close the

raw

water seacock (thru-hull).

5.

Crank the engine

and

allow the gauge to reach a

maximum reading,

then

record that reading.

6.

Repeat this process for each cylinder.

Compression

pressure

427

psi

(30

kgffcm2)

at

290

rpm.

Maximum

permissible

difference

between

cylinders

is

42.7

psi

(3

kgf/cm2)

NOTE:

If

the

readings

are

below

the

limit,

the

engine needs

repair

7.

Re-install the glow plugs (use anti-seize compound

on

the

threads) and reset the

fuel

shut-off

to

the run position.

S.

Open the raw water seacock (thru-hull).

LOW

COMPRESSION

When

low

compression is found, determine the cause

by

applying a small amount of

oil

in

the cylinder thru the

glow

plug

hole.

Allow the oil

to

settle.

Install the pressure gauge

and

repeat

the

above

test.

If the

compression reading rises dramatically,

the

fault

is

with

the

rings.

If

the

compression

valve

does not rise, the problem

is

with

the

valves.

A slight rise

in

compression

would

indicate a problem

with

both

the

rings and

the

valves.

FUEL

INJECTORS

In

case of severe vibrations and detonation

noise,

have

the

injectors checked

and

overhauled

by

an

authorized

fuel

injection service

center.

Poor

fuel

quality, contaminants

and

loss

of

positive

fuel

pressure

to

the injection pump

can

result

in

injector

faults.

Since

fuel

injectors must

be

serviced

in

a

clean

room

enviroment, it

is

best

to

carry

at

least one extra

injector

as

a spare should a problem

occur.

Before removing the old injector, clean

the

area around

the

base

of

the

injector

to

help

prevent

any

rust

or

debris

from

falling

down

into the injector hole.

If

the

injector

will

not

lift

out easily

and

is

held

in

by

carbon build-up or the like,

work

the

injector side-to-side with the

aid

of

the

socket

wrench

to

free

it,

and

then

lift it

out.

The injector seats

in

the

cylinder head

on

a copper sealing

washer.

This

washer should

be

removed

with

the

injector

and

replaced

with

a

new

washer when

the

new

injector

is

installed.

Injector

to

Cylinder

Head

Tightening

Torqlle

40

± 4 fHb

(5.5

±

0.5

kgf-m)

FUEL

INJECTOR

I

I

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