Volvo Penta TAMD74A-A Operator's Manual page 43

A
4
1
B
3
5
5. When coolant that is free from air flows out, the
ventilation cocks must be closed.
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.
Coolant. Drain
2 WARNING! Stop the engine and allow it to cool
down before draining. Hot oil and hot surfaces
can cause burns.
WARNING! Glycol is a health hazard (poison).
Collect the old coolant and leave it to a destruc-
tion plant.
IMPORTANT! The coolant is drained via the
taps (1–3) and the plugs (4, 5). Most of the cool-
ant is drained via tap (1) but all drain points must
be opened for all coolant to be drained.
1. Remove the filler cap on the expansion tank.
2. Open vent cock (A) and vent cocks (B) by the
heat exchanger.
3. Connect a suitable hose to tap (1) on the cylinder
block. Open the tap and let the coolant run out into
a suitable vessel.
IMPORTANT! Check that the coolant really runs
out. Deposits may need to be removed inside the
drain plugs/taps.
4. Continue with the other drain points until all five
have been opened and all coolant has been
drained off.
5. Drain any other systems such as heater, water
heater, etc., connected to the freshwater system
too.
6. Close all drainage points.
Maintenance: Freshwater system
41