Major Servicing Parts - Yanmar 6LYA-STP Manual De Instrucciones

2.4 Major Servicing Parts

Name of Part
●Fuel filter
●Fuel feed pump
●Engine oil filler cap
●Lube oil filters
(Full-flow & by-pass)
［Cooling Water
System]
●Fresh water cooler
○Filler cap
○Sub tank
○Rubber hose
●Fresh water pump
●Seawater pump
● Oil cooler
● Turbocharger
●Inter-cooler
●Anticorrosive zinc
●Name plate
●Starter
●Alternator
Removes dust and water from fuel. Drain the filter periodically, (there is a
drain plug at the bottom). The internal element (filter) should be changed
periodically.
Feeds fuel to the fuel injection pump.
Equipped with mechanical pump attached with the fuel injection pomp.
Filler port for engine lube oil.
Filters fine metal fragments and carbon from the lube oil.
The oil through the full flow filter is sent to the engine's moving parts and
another ones through the by-pass filter returns to oil pan.
This engine has two cooling water systems (for fresh water & for seawater).
Fresh water flows from the fresh water tank into the fresh water cooler, where
the fresh water is cooled by sea water.
The fresh water then flows into the cylinder block throgh the fresh water pump.
It further cools the turbocharger and goes back to the fresh water tank.
The fresh water cooler is a heat exchanger using sea water.
The filler cap mounted on the fresh water tank has a pressure regulating
valve.
When the cooling water temp. rises and then the pressure rises inside the
fresh water tank, the pressure regulating valve releases vapor and hot water
overflow to the sub tank.
The hose is connected betweev the filler cap and sub tank. Vapor and hot
water discharged to the sub tank.
When the engine stops and cooling water cools, the pressure in the cooling
water tank also drops to negative pressure. The filler cap valve then opens to
suck water back from the sub tank. This minimizes cooling water
consumption.
The centrifugal water pump circulates fresh cooling water inside the engine.
The pump is driven by the V-belt.
The rubber impeller-type pump is driven by gears. Do not operate it without
seawater, due to damage the impeller.
This heat exchanger cools high temp. engine oil by 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-corrosive zinc is installed in the oil cooler, inter-cooler,
etc. to prevent this.
The anti-corrosive zinc 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.
Name plates are provided on the engine and have the model, serial number
and other data.
Starter powered by the battery.
Rotates by belt drive, generates electricity and charges the battery.
Function
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