Volvo Penta TAMD74A, Operator'S Manual

Page: 43 / 76

41
Maintenance: Freshwater system
Coolant. Filling
WARNING! Stop the engine and allow it to cool
down before filling. Hot oil and hot surfaces can
cause burns.
Topping up
Fill with coolant to the correct level through the filler
opening (1) on 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”.
Filling the system when empty
1. Open the vent tap by the turbocharger (2) and at
the keel cooler circuit return pipe (3).
NOTE! Do not open the bleed screw by the charge
air cooler if the circuit is part of the seawater sys-
tem.
2. Make sure any other systems such as heater, wa-
ter heater, etc., connected to the cooling system
are also ventilated.
3. Fill with coolant via the filler opening on the expan-
sion tank.
4. Fill slowly so that the evacuated air is able to pass
through the ventilation cock/cocks and the filler
opening.
5. Close the ventilation cocks/cocks as coolant that
is free from air runs out of them.
6. Cease filling when the correct level is attained.
7. Start the engine and run it until it reaches operat-
ing temperature.
IMPORTANT! The engine must not be start-
ed before the system has been bled and
filled.
8. Stop the engine and allow it to cool down. Check
the coolant level and top up if needed.
3
2