Yanmar BY series Spezifikationen PDF herunterladen (Seite 36)

PRODUCT OVERVIEW

BY Series Operation Manual 29

FUNCTION OF MAJOR COMPONENTS

Name of

Component

Function

Fuel Filter / Water

Separator

Removes dirt and water from the fuel. The filter element should

be replaced periodically. See Replace Fuel Filter / Water

Separator Element on page 90. The water separator should be

drained periodically. See Drain the Fuel / Water Separator on

page 54.

Fuel Fine Filter

Removes extremely fine contaminants from fuel prior to entering

fuel injection system.

Fuel Feed Pump Pumps fuel from the tank to the fuel injection system.

Engine Oil Fill Port To add engine oil.

Engine Oil Filter Filters fine metal fragments and carbon from the engine oil.

Filtered engine oil is distributed to the engine's moving parts. The

filter is a cartridge type and the element should be replaced

periodically. See Change the Engine Oil and Replace the Engine

Oil Filter on page 83.

Coolant System There are two cooling systems: 1) closed cooling with coolant and

2) seawater. The engine is cooled by the closed cooling system.

The closed system coolant is cooled by seawater using a heat

exchanger. The seawater also cools the marine gear or power

steering oil, and the combustion intake air through cooler(s) in an

open circuit.

Closed Cooling

Circulation Pump

The centrifugal coolant pump circulates coolant inside the engine.

The circulating pump is driven by a poly V-belt.

Seawater Pump Pumps seawater from outside vessel to the engine. The seawater

pump is belt-driven and has a replaceable rubber impeller. Avoid

impeller damage, do not operate it without seawater.

Coolant Fill Cap When the coolant temperature rises, the pressure inside the heat

exchanger increases, causing the pressure valve in the filler cap

to open, forcing hot water and steam through a rubber hose to the

coolant recovery tank. When the engine becomes cool and the

pressure inside the coolant recovery tank drops, the vacuum

valve in the filler cap opens and the coolant in the coolant

recovery tank returns to the heat exchanger through the hose and

filler cap. This minimizes coolant consumption.

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