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Maintenance: Freshwater system
Cooling system, external cooling
Introduction
A cooling system with external cooling does not have
a heat exchanger but is cooled by heat being trans-
ferred via one or two external cooling circuits. A sin-
gle circuit system serves all the components being
cooled. A dual circuit system has either two freshwa-
ter circuits or one freshwater circuit together with one
seawater circuit. In both cases, one of the circuits
cools the engine and the other circuit cools the
charge air cooler and the oil coolers.
Coolant level. Check
WARNING! Never open the filler cap when the
engine is warm. Steam or hot fluid may spurt
out.
Make sure the level ends up between the MIN and
MAX marks. If there are no marks, the coolant level
should be approx. 5 cm below the top of the filler cap
(1). Fill if necessary with the same type of coolant that
is already in the system.
IMPORTANT! Check the coolant level on a cold
stationary engine.
Coolant. Filling
WARNING! Stop the engine and allow it to cool
down before filling. Hot fluids and hot surfaces
can cause burns.
Topping up
Fill with coolant to the correct level through the filler
opening (1) in the expansion tank. Fill slowly so that
the evacuated air is able to pass through the filler
opening.
IMPORTANT! Use the same type of coolant that
is already in the system.
IMPORTANT! If the heat exchanger is empty,
the coolant must be filled according to the de-
scription “Filling the cooling system when emp-
ty”.
TAMD103
TAMD122A
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TAMD122P
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