Westerbeke 38B FOUR Manuel de l'opérateur télécharger pdf (Page 32)

Oil Drain Hose

oil

sump drain hose

installed

the

engine

with the discharge

end

secured

a bracket at

the

front

the

engine.

Oil

may

drained from this

hose

by removing

the

cap

and

the discharge

end

the

hose

from

the

support bracket

and

lowering the

hose

into a container.

The

hose

cap

fitting

1/4 inch

NPT

(National

Pipe

Tap)

and

can

extended, or

have

a pump added for easier

removal

the

old

oil,

desired.

Connecting Pressure Sensing Devices

Oil

Galleries

Oil

pressure sensing devices,

such

senders

and

switches, must not

connected to

engine's

oil

gal-

lery with the

use

of extended nipples or

tees.

The

reason

simply that continued engine vibration

causes

fatigue

the fittings

used

make

such a connection.

these

fittings

fail,

the

engine

loses

its

oil

pressure

and

quickly

seizes.

When

additional sensing devices such

switches or sensors

need

installed that function

engine

oil

pressure, these devices

must

bulkhead-mounted

and

connected to the

oil

gallery using

appropriate

grade

lubricating

oil

hose.

Any fittings

used

to connect

the

hose to the gallery must

steel

malle-

able iron composition.

Brass

must not

used

for this application.

Cooling System

The

engine

fresh

water cooled

engine-mounted

heat

exchanger.

Sea

water

used

the heat

exchanger's

cooling medium.

Sea

water

pumped into the exchanger

sea

water

pump,

where

cools

the

fresh

water that circulates through

the

engine block,

and

then injected into

the

exhaust discharge, car-

rying with it

the

heat removed from the engine's

fresh

water cooling

system.

Sea

water should

supplied to the

sea

water pump through a flush-type through-hull fitting using a wire-

reinforced hose between the through-hull fitting

and

the

sea

water pump.

The

sea

water should

directed

through a visual-type

sea

water strainer, which will trap debris before

reaches

the

sea

water pump

and

the

heat exchanger,

and

then

delivered to

the

pump. Hoses routed from

the

through-hull fitting to

the

strainer

and

the

sea

water pump should

wire-reinforced to

prevent

the

hose

from collapsing while the engine.

running (suction from

the

pump may collapse a non-reinforced

hose).

The

sea

water strainer should

mounted

or below the water line to

make

sure

the

sea

water line

remains

primed.

CAUTION

NOT

use

a scoop-type through-hull fitting

means

of supplying

sea

water to the

en-

gine.

Water pressure against this type of fitting, while

the

vessel

under

sail,

can

push

sea

water past the

sea

water pump's impeller into the engine's exhaust

system,

filling

and

the

engine

well.

Flush-type,

clear,

through-hull fittings

are

recommended

and

should

lo-

cated

the

hull

below

the

waterline during

all

angles

boat operation.

The

use

of common-type street elbows

not recommended for plumbing the

sea

water cir-

cuit.

These

generally

have

very restrictive inside diameters. Machine fittings

are

preferred.

Westerbeke Diesel Engines

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Westerbeke 38B FOUR Manuel de l'opérateur Page 32

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