Volvo Penta D9-425, Operator'S Manual

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49
Maintenance. Freshwater system
3. Fill up with coolant via the filling hole on the ex-
pansion tank.
Fill slowly, to allow the air which is forced out a
chance to flow out of the filling hole.
4. Fill up with coolant to about 5 cm (2") below the
filling cap seal plane.
5. Start the engine and let it idle for about 1 hour.
IMPORTANT! Do not start the engine until
the system is vented and completely filled.
6. Stop the engine and let it cool. Check the coolant
level. Top up as necessary.
Coolant. Draining.
WARNING! Stop the engine and let it cool be-
fore draining. Hot fluids and hot surfaces can
cause burns.
WARNING! Glycol is poisonous (dangerous to
drink). Collect the old coolant and hand it to a re-
cycling station for destruction. Drain the coolant
via taps (F).
1. Remove the filling cap (1) from the expansion tank.
2. Connect a suitable hose to each drain tap. Open
the taps and allow all the coolant to drain off into a
suitable vessel.
IMPORTANT! Check that all coolant really
does drain out. Deposits may need to be
cleared away, inside the drain plug(s)/tap(s).
3. Also drain the heating system, tap water heater
etc., if connected to the engine’s freshwater system.
4. Close all drain taps.
1
F F
F
F