Function Of Major Components - Yanmar 8LV320 Operation Manual

FUNCTION OF MAJOR COMPONENTS

Name of Component
Fuel Filter
Fuel Supply Pump
Fuel Priming Pump
Fuel Cooler
Engine Oil Filler Port
Engine Oil Filter
Cooling System
Closed Cooling
Circulation Pump
Seawater Pump
Coolant Filler Cap
Coolant Reservoir Tank
Oil Cooler - Engine
Turbo-charger
Charge Air Cooler
Intake Silencer (Air
Cleaner)
Nameplates
Starter
Alternator
Engine Oil Dipstick
8LV Series Operation Manual
Removes dirt and water from the fuel. Drain the filter periodically. The filter element should
be replaced periodically. The fuel/water separator (if equipped) should be drained
periodically. See Draining the Fuel/Water Separator on page 44.
Pumps fuel from the tank to the fuel injection system.
This is a manual fuel pump. Pushing the knob on the top of the fuel filter feeds the fuel.
The pump is also used to bleed air from the fuel system.
Cool the fuel with seawater to reduce the high temperature of the fuel circuit.
Filler port for engine oil.
Filters fine metal fragments and carbon from the engine oil. Filtered engine oil is
distributed to the engine's moving parts. The filter is a cartridge type and the element
should be replaced periodically. See Changing the Engine Oil and Replacing the Engine
Oil Filter Element on page 47.
There are two cooling systems: closed cooling with coolant (freshwater) and seawater.
The engine is cooled by the closed cooling circuit. The closed circuit is cooled by seawater
using a heat exchanger. The seawater also cools the marine gear oil and intake air
through the air cooler(s) in an open circuit.
The centrifugal water pump circulates coolant inside the engine. The circulating pump is
driven by a belt.
Pumps seawater from outside vessel to the engine. The seawater pump is belt-driven and
has a replaceable rubber impeller. Never operate it without seawater, as this will damage
the impeller.
When the coolant temperature rises, the pressure inside the coolant tank increases and
opens the pressure valve in the filler cap. When the pressure valve in the filler cap is
opened, hot water and steam pass through a rubber hose to the coolant reservoir tank.
When the engine cools and the pressure inside the coolant tank drops, the vacuum valve
in the filler cap opens and the coolant in the coolant reservoir tank returns to the coolant
tank through the pipe and filler cap. This minimizes coolant consumption.
The pressure valve in the filler cap releases vapor and hot water overflow to the coolant
reservoir tank. When the engine stops and the coolant cools, the pressure in the coolant
tank drops. The filler cap vacuum valve then opens to send water back from the coolant
reservoir tank. This minimizes coolant consumptions. The closed cooling system coolant
level can easily be checked and refilled in this tank.
A heat exchanger that cools high temperature engine oil using coolant.
The turbo-charger pressurizes the air coming into the engine. It is driven by a turbine that
is energized by exhaust gases.
This heat exchanger cools the pressurized charging air from the turbo-charger with
seawater to increase the charging air quantity.
The intake silencer guards against dirt in the air and reduces the noise of air intake.
Nameplates are provided on the engine and the marine gear and have the model, serial
number and other data.
Starter motor for the engine. Powered by the battery.
Driven by belt and generates electricity and charges the battery.
Gauge stick for checking the engine oil level.
PRODUCT OVERVIEW
Function
15