Yanmar 4JH3-TE, Руководство по эксплуатации

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2. PRODUCT EXPLANATION 11
2.4 Major Servicing Parts
Name of part Function
Fuel filter Removes dust and water from fuel. The filter is a cartridge type, and the inner element
should be replaced before clogging occurs.
A water separator is on the bottom of the filter and should be drained periodically.
Fuel priming pump This is a manual fuel pump. Moving the knob on the top of the fuel filter feeds the fuel.
The pump is also used to bleed air from the fuel system.
Fuel feed pump This is a mechanical pump used to feed fuel to the fuel injection pump.
It is built into the fuel injection pump.
Filler port (engine oil) Filler port for engine lube oil.
Filler port (marine gear oil) Filler port for marine gear lube oil. Located on the top of the marine gear case.
Dipstick (engine oil) Gauge stick for determining the level of the engine oil.
Lube oil filter Filters fine metal fragments and carbon from the lube oil. The filter is a cartridge type,
and the inner element should be replaced before clogging occurs.
[
Cooling Water System
]
This engine is cooled by 2 cooling systems:fresh water and seawater.
Fresh water cooler
(Built-in fresh water tank)
The tank stores the fresh cooling water and is built into the fresh water cooler.
Cooling seawater passes through the fresh water cooler to cool the fresh water by heat
exchange.
Cooling water pump
Located on top of the fresh water tank the filler cap closes the filler port.
It has two pressure regulating valves (pressure valve and vacume valve).
Filler cap
When the cooling water temperature rises, the pressure inside the fresh water tank
increases causing the pressure valve in the filler cap to open.
Hot water and steam pass through a rubber hose to the subtank to condense the hot water.
(The filler port and the subtank are connected by a rubber hose.)
Subtank
When the load is reduced and the cooling water temperature falls, the pressure in the fresh
water tank is lowered, and this activates the vacume valve in the filler cap causing the cool
water in the subtank to return to the fresh water tank.
This process reduces the consumption of cooling water.
Oil cooler (engine oil) This heat exchanger cools the engine oil with seawater.
Oil cooler (marine gear oil) This heat exchanger cools high temp. marine gear oil with seawater.(KBW21,KMH4A)
Turbocharger With the pressurized intake air feeding device the exhaust gas turbine is rotated by
exhaust gas, and the power is used to rotate the blower
This pressurizes the intake air for sending to the cylinder gives high power output.
Intercooler This heat exchanger cools the pressurized intake air from the turbocharger with seawater
and increases the intake air guantity.
Starter motor This is a DC motor for electrical starting. Electric current causes the pinion gear to engage
with the ring gear on the flywheel to start the engine.
Alternator This is a AC generator built in the rectifier and regulator which rotates by V-belt drive to
charge the battery during operation.