Function Of Major Components - Yanmar 6SY Series Operation Manual

PRODUCT OVERVIEW

FUNCTION OF MAJOR COMPONENTS

Name of part
Fuel Filter
Fuel Feed Pump
Engine Oil Fill Port
Engine Oil Filter
Coolant System
Heat Exchanger
Closed Cooling Circulation
Pump
Seawater Pump
Coolant Fill Cap
Coolant Recovery Tank
Oil Cooler
Turbocharger
Anode
Nameplates
Starter
Alternator
22
Function
Removes dirt and water from the fuel. Drain the filter periodically. The filter
element should be replaced periodically. See Drain or Replace the Fuel Filter
Element and Fuel Filter / Water Separator on page 89.
Pumps fuel from the tank to the fuel injection system.
Fill 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.
There are two coolant systems: closed cooling with coolant and seawater. The
engine's combustion heat is cooled by the closed cooling circuit. The closed circuit
is cooled by seawater using a heat exchanger. The seawater also cools the
engine / marine gear oil.
The heat exchanger cools the closed cooling circuit with seawater.
The centrifugal water pump circulates coolant inside the engine. The circulating
pump is driven by a belt.
The rubber impeller-type pump pumps seawater for cooling. Never operate it
without seawater, as this will damage the impeller.
The fill cap on the coolant tank has a pressure regulating valve. When the coolant
temperature rises, the pressure rises inside the fresh water system.
The pressure regulating valve releases vapor and hot water overflow to the
coolant recovery tank. When the engine stops and the coolant cools, the pressure
in the coolant tank drops. The fill cap valve then opens to send water back from
the coolant recovery tank. This minimizes coolant consumption. 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 seawater.
The turbocharger pressurizes the air coming into the engine. It is driven by a
turbine that is energized by exhaust gases.
The metal area of the seawater coolant system is prone to electrical corrosion. The
anodes are installed to prevent this corrosion. The anodes are reduced over time
by electrical corrosion and must be replaced before it is completely consumed in
order to ensure that the metal area of the seawater coolant system remains fully
protected.
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.
6SY Operation Manual