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Yanmar 3JH3(8)E - Major Servicing Parts

Yanmar 3JH3(8)E
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2.
Product explanation
2.4
Major
Servicing Parts
Name
of
part
Function
Fuel
filter
Removes dust and water from fuel. Drain the filter periodically. The internal
element (filter) should
be changed periodically.
Fuel feed pump Feed fuel
to
the fuel injection pump. Moving the priming
Priming lever lever up and down feeds the fuel. When there is no fuel, the priming lever
is used
to
bleed air from the fuel system.
Filler port (engine) Filler port for engine lube oil.
Filler port (marine gear) Filler port for marine gear lube oil.
Lube oil filter Filters fine metal fragments and carbon from the lube oil.
Filtered lube oil
is distributed
to
the engine's moving parts.
Cooling System Seawater passes through the heat exchanger cooling the fresh water,
which
in
turn cools the engine.
Fresh
water
cooling
Fresh water
pump
There are
two
cooling systems: fresh water and seawater.
The fresh water pump is
run
by the alternator and the V-belt.
Fresh water cooling The fresh water
in
the fresh water cooler is fed
to
the engine by the fresh
water pump. The
cooling fresh water returns to the engine after it is cooled
with seawater
in
the fresh water cooler.
Filler
cap
The filler cap on the cooling water tank covers the water supply port. The
cap has a pressure
regulating valve. When the cooling water temp. rises,
the pressure rises inside the fresh water
cooler.
Subtank
The pressure regulating valve releases vapor and hot water overflow to the
subtank.
Rubber
hose
The hose connects the filler cap and subtank. Vapor and hot water
discharged to the subtank return there
to
the cooling water. When the
engine stops and
cooling water cools, the pressure
in
the cooling water
tank
also drops very low. The filler cap valve then opens to send water
back from the subtank. This minimizes
cooling water consumption.
Fresh
water
pump The centrifugal water pump circulates fresh cooling water inside the
engine. The pump and
alternator are driven by the V-belt.
Intake air silencer This is the air intake silencer. The silencer guards against dirt
in
the air and
reduces the noise of air intake.
Nameplate
Name plates are provided on the engine and the marine gear and have the
model, serial number and other data.
Starter Starter motor for the engine. Powered by the battery.
Alternator Rotates by belt drive, generates electricity and charges the battery.
15

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