Function Of Major Components - Yanmar 6LY3 series Operation Manual

PRODUCT OVERVIEW

FUNCTION OF MAJOR COMPONENTS

Name of part
Fuel Filter
Fuel
Feed Pump
Engine Oil Fill Port
Lubricating Oil Filter
(At Full-flow and Bypass
Sides)
Cooling Water System
Fresh Water Cooler
Fresh Water Pump
Seawater Pump
Fresh Water / Coolant Fill
Cap
Coolant Recovery Tank
Oil Cooler
Turbocharger
Inter-Cooler
Anti-Corrosion Anode
Nameplates
Starter
Alternator
26
Back
Function
Removes dirt and water from fuel. Drain the filter periodically. The element (filter)
should be replaced periodically. See Replace the Fuel Filter Element on
page 106.
Pumps fuel from tank to the fuel injection pump. Equipped with built-in centrifugal
vane.
The fill port used to add engine lubricating oil.
Filters fine metal fragments and carbon from the lubricating oil. Filtered lube oil is
distributed to the engine's moving parts.
There are two cooling systems: fresh water and seawater. The engine's
combustion heat is cooled by the fresh water / coolant in a closed circuit. The fresh
water is cooled by seawater using heat exchanger. The seawater also cools the
lube oil of engine / marine gear and also intake air through coolers in an open
circuit.
The fresh water cooler is a heat exchanger to cool the fresh water by using
seawater.
The centrifugal water pump circulates fresh cooling water inside the engine. The
fresh water pump is driven by V-belt.
The rubber impeller type pump raises seawater for cooling. Never operate it
without seawater, as this will damage the impeller.
The fill cap on the coolant tank covers the water supply port. The cap has a
pressure regulating valve. When the cooling water 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 cooling water cools, the
pressure in the cooling water tank also drops very low. The fill cap valve then
opens to send water back from the coolant recovery tank. This minimizes cooling
water consumption. Fresh water / coolant level can easily be checked and refilled
in this tank.
This heat exchanger cools high temperature lube oil with seawater.
The pressurized intake air feeding device: the exhaust gas turbine is rotated by
the exhaust gas, and the power is used to rotate the blower. This pressurizes the
intake air for sending to the cylinder.
This heat exchanger cools the pressurized intake air from the turbocharger with
seawater.
The metal area of the seawater cooling system is prone to electrical corrosion. The
anti-corrosion anode is installed in the oil cooler, aftercooler, etc. to prevent this.
The anti-corrosion anode is itself reduced over time by electrical corrosion, so it
must be replaced at fixed intervals before it is completely consumed in order to
ensure that the metal area of the seawater cooling system remains fully protected.
Nameplates are provided on the engine and the marine gear and include the
model, serial number and other data.
Starter motor for the engine. Powered by the battery.
Driven by V-belt and generates electricity and charges the battery.
6LY3 Operation Manual