PRODUCT OVERVIEW
TNV Operation Manual
21
FUNCTION OF MAJOR ENGINE COMPONENTS
Components
Functions
Air Cleaner
The air cleaner prevents airborne contaminants from entering the
engine. Since the air cleaner is application specific, it must be
carefully selected by an application engineer. It is not part of the
basic engine package as shipped from the Yanmar factory. Periodic
replacement of the air cleaner filter element is necessary. See the
Periodic Maintenance Schedule on page 73
for the replacement
frequency.
Alternator
The alternator is driven by a V-belt which is powered by the
crankshaft V-pulley. The alternator supplies electricity to the engine
systems and charges the battery while the engine is running.
Dipstick (Engine Oil)
The engine oil dipstick is used to determine the amount of engine
oil in the crankcase.
Electric Fuel Pump
The electric fuel pump makes sure there is a constant supply of
diesel fuel to the fuel injection pump. The electric fuel pump is
electro-magnetic and runs on 12 VDC. An electric fuel pump may
be installed as an option or as standard equipment. Standard
equipment may vary based on engine model and specification. If an
electric fuel pump is installed, turn the key switch to the ON position
for 10 to 15 seconds to prime the fuel system.
Engine Oil Filter
The engine oil filter removes contaminants and sediments from the
engine oil. Periodic replacement of the engine oil filter is necessary.
See the
Periodic Maintenance Schedule on page 73
for the
replacement frequency.
Engine Oil Cooler
(If Equipped)
The engine oil cooler helps to keep the engine oil cool. Engine
coolant from the cooling system is circulated through an adapter at
the base of the engine oil filter assembly and then returned to the
cylinder block.
Fuel Filter
The fuel filter removes contaminants and sediments from the diesel
fuel. Periodic replacement of the fuel filter is necessary. See the
Periodic Maintenance Schedule on page 73
for the replacement
frequency.
Please note that the word “diesel” is implied
throughout this manual when the word “fuel” is used.
Fuel Filter / Water Separator
The fuel filter / water separator removes contaminants, sediments
and water from diesel fuel going to the fuel filter. This is a required
component of the fuel system. This is standard equipment with
every engine. The separator is installed between the fuel tank and
the fuel pump. Periodically drain the water from the fuel filter / water
separator using the drain cock at the bottom of the separator.
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