Yanmar 4LHA-HTP Operation Manual page 20

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2.4 Major Servicing Pai
Function
Name of Part
Removes dust and water from fuel. The filter is a cartridge type, and the fuel element
should be replaced before clogging occurs.
A water separator is on the bottom of the filter and should be drained^?
• F u e l filter
(for 4LHA-HTP/HTZP). For 4LHA-DTP/-DTZP/-STP/-STZP, dram the dust and water
periodicaly removing the drain plug at the bottom of filter.
Feeds fuel to the fuel injection pump builting-in the fuel injection pump (4LHA-HTP/-
• F u e l feed pump
F?4LHA-DTP/-DTZP/-STP/STZP, it is attached with the fuel injection pump.
This is a manual fuel pump. Moving the knob on the top of f « j j ^ j ^ g * ^
The pump is also used to bleed air from the fuel system (4L.HA-HTP/ H u r j .
• F u e l priming pump
For4LHA-DTP/-DTZP/-STP/-STZP, moving the knob on the fuel feed pump attached
with the fuel injection pump feeds the fuel to bleed air.
Filler port for engine lube oil.
• L u b e oil filler cap
Filters fine metal fragments and carbon from the lube oil
The filter is a cartridge type and the filter element should be replaced before c o g ^
• L u b e oil filter
occurs.
This engine has two cooling water systems (for fresh water & ^
[Coolina Water [Coolina Water [Coolina Water [Coolina Water
water flows from the fresh water tank into the fresh water cooler, where the tresn
System] System] System] System]
r ^ e S ^ ^
It further cools the turbocharger and goes back to the fresh water tank.
• F r e s h water cooler • F r e s h water cooler • F r e s h water cooler • F r e s h water cooler
The fresh water cooler is a heat exchanger using sea water
OFiller cap OFiller cap OFiller cap OFiller cap
O S u b tank O S u b tank O S u b tank O S u b tank
wSen " L engine stops and cooling water cools, the pressure h t h e c a * * w a w
ORubber hose ORubber hose ORubber hose ORubber hose
tank aiso dro^s to
back from tne suo xan*. i ms nun
• F r e s h water pump • F r e s h water pump • F r e s h water pump • F r e s h water pump
The centrifugal water pump circulates fresh cooling water ins.de the engine.
The pump driven by the V-belt.
The rubber impeller-type pump is driven by gears. Do not operate it without s e a v ^ f ,
•Seawater pump •Seawater pump •Seawater pump •Seawater pump
due to damage the impeller.
This heat exchanger cools high temp, engine oil by seawater.
• O i i cooler
The pressurized intake air feeding device: the exhaust gas turbine » rotateo oy
the exhaust gas, and the power is used to rotate the blower.
•Turbocharger
•Inter-cooler
•Anticorrosive zinc
• N a m e plate
•Starter motor
•Alternator
n e g a t i v e ^ ^ ^ ^ ^ Z S S S " *
This pressurises the intake air for sending to the cylinaer.
This heat exchanger cools the pressurized intake air from the turbocharger with
seawater.
The metal area of the seawater cooling system is prone ^
The anti-corrosive zinc is installed in the oil cooler, inter-coole • etato P
The anti-corrosive zinc is itself reduced overtime by electncal oomxjor. so t m u a oe
replaced at fixed intervals before it is completely consumed m-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, senal number and other
data.
Starts the engine powered by the battery.
Driven by belt, and generates electricity and charges the battery.
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