Westerbeke 65B-FOUR Manual de Instalação descarregar pdf (Página 21)

COOLING

SYSTEM

FRESH

WATER

COOLING

CIRCUIT

NOTE:

Refer to the ENGINE COOLANT section

for

the

rec-

ommended antifreeze and water mixture to be used as the

fresh water coolant.

Fresh water coolant

pumped through the engine by a circu-

lating pump, absorbing heat from the engine. The coolant

then passes through the the1mostat into the manifold, to the

heat exchanger where it

cooled, and returned to the engine

block via the suction side

the circulating pump.

When the engine

started cold, external coolant flow

pre-

vented

the closed thermostat (although some coolant

flow

bypassed around the thermostat to prevent the exhaust

manifold from overheating). As the engine warms

up,

the

thermostat gradually opens, allowing full

flow

the engine's

coolant

flow unrestricted to the external portion

the

cooling s:rstem.

KEEP

THE

COOLANT

RECOVERY

TANK

COOLANT

PASSAGE

CLEAR

FROM

COOLANT

RECOVERY

TANK

COOLANT

EXP4NS/ON

PRESSURE

/CAP

NOTE:

Periodically check the condition

the manifold

pressure

cap.

Ensure the upper

and

lower rubber seals are in

good

condition. Check to ensure

the vacuum valve opens

and

closes tightly.

Cany

a spare

cap. Check also to ensure the

coolant passage is clear so

coolant within

the.

system is

able to expand and contract

SEAL

and

from the coolant recove1ytank.

Coolant

Recovery

Tank

A coolant recovery tank allows for engine coolant expansion

and contraction during engine operation, without any signifi-

cant loss of coolant and without introducing air into the cool-

ing system. This tank should be located at or above the

engine manifold level and should be easily accessible.

NOTE:

This

tw1.k,

with its

sh011

run

plastic hose, is best

located at

above the level

the engines manifold.

CHANGING

COOLANT

The engine's coolant must be changed according

the

MAINTENANCE SCHEDULE.

the coolant

allowed

become contaminated, it can

kad

overheating problems.

CAUTION:

Proper

cooling

system

maintenance

critical;

substantial

number

engine

failures

can

traced

back

cooling

system

corrosion.

Drain the engine coolant by loosening the drain plug on the

engine block and opening the manifold pressure cap. Flush

the system with fresh water, then start the refill process.

NOTE:

The drain on the heat exchanger should also be used

help_

drain engine coolant.

OIL

GALLERY

Refilling

the

Coolant

After closing the engine block drain, pour clean, premixed

coolant into the manifold and when the coolant

visible

the manifold, start the engine and run it at slow idle. Open

the air bleed petcocks on the manifold and the thermostat

housing.

Monitor the coolant in the manifold and add

needed. Fill

the manifold to the filler neck and when the coolant flowing

from the petcock

free

air bubbles, close the petcock and

install the pressure cap.

Remove the cap

the coolant recovery tank and

fill

with

coolant mix to halfway between

LOW and MAX and replace

the cap. Run the engine and observe the coolant expansion

flow

into the recovery tank. When the petcock on the thermo-

stat housing

free

air bubbles, close that petcock.

After checking for leaks, stop the engine and allow it to cool.

Coolant should draw back into the cooling system

the

engine cools down. Add coolant to the recovery tank if

needed. Clean

any spilled coolant.

WARNING:

Beware

the

hot

engine

coolant.

Wear

protective

gloves.

/-w"/WESTERBEKE

I Enaines & Generators

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