Westerbeke 65B-FOUR Manual de Instalação descarregar pdf (Página 32)

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE recommends that the following engine adjust-

ments be performed by a competent engine mechanic. The information

below

is provided to assist the mechanic.

FUEL

SHUT-OFF

TESTING

OIL

PRESSURE

test the oil pressure, remove the oil pressure sender, then

install a mechanical oil pressure gauge in it's place. After

warming up the engine, set the engine speed at idle and read

the oil pressure gauge.

OIL

PRESSURE

WILL

RANGE

BETWEEN

AND

55PSI

1800

RPM

LOW

OIL

PRESSURE

. The specific safe minimum oil pressure is 5 - 10 psi. A grad-

ual loss

oil pressure usually indicates worn bearings. For

additional infonnation on low oil pressure readings, see the

ENGINE TROUBLESHOqTING chart.

OIL

GALLERY

MECHANICAL

OIL

PRESSURE

GAUGE

OIL

GALLERY

ENGINE

COMPRESSION

Check the compression pressure. To do tllis

wann

the engine,

remove all fuel injectors, or glow plugs, disconnect the fuel

shut-off solenoid wire, and install a compression adapter in

the injector hole or glow plug hole. Connect a compression

tester on the adapter

and

crank the engine with the starter

motor until the pressure reaches a maximum value. Repeat

this process for each cylinder. Look for cylinders with

dramaticaliy (at least 20%) lower compression than the

average

the others. Compression pressure should not differ

by more than 35.5 psi (2.5 kg/cm

) at 280 rpm.

a weak cylinder is flanked by healthy cylinder, the problem

is either valve or piston related. Check the

valve clearances

for the weak cylinder, adjust as needed and test again.

the

cylinder is still

low,

apply a small amount

oil into the

cylinder to seal the rings and repeat the test.

compression

comes up - the rings are faulty.

Abnonnally high readings

all cylinders indicates heavy

carbon accumulations, a condition that

nlight be

accompanied by

lligh pressures and noise.

Loosen the locknut on the

idle adjustment bolt.

2. Adjust the bolt so that the

throttle control lever will hold

the engine at a quiet idle

(

800

1000

RPM).

3. Tighten the locknut.

. 4. Race the engine several

times to ensure the idle

DRIVE

BELT

ADJUSTMENT

STOP

CONTROL

CAiRE

ENGINE

STOP

ADJUSTMENT

POSITION

CABLE

THAT

THE

STOP

CONTROL

WILL

SHUT

THE

ENGINE

DOWN.

Excessive drive belt tension can cause rapid wear

the belt

and reduce the service life

the fresh water pump's bearing.

A slack belt or the presence

oil on the belt can cause belt

slipping, resulting in high operating temperatures.

The drive belt is properly adjusted

the belt can be

deflected no less than 3/8 inch (lOmm) and no more than

l/2

inch (12mm) as the belt is depressed with the thumb at the

midpoint between the two pulleys on the longest span

the

belt. A spare belt or belts should always be carried on board.

WARNING:

Never

attempt

check

adjust

the

drive

belt's

tension

while

the

engine

operation.

Adjusting

Belt

Tension

Loosen the alternator pivot bolt.

2. Loosen the alternator adjusting bolt.

3. With the alternator loose, swing it outward until the drive

belt is tensioned correctly.

4. Tighten both bolts.

5. Check the tension again after the engine has been

operation.

Engines & Generators

ALTERNATOR

ADJUSTING

BOLT

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 63 64

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