Volvo D2 Series Betreibershandbuch PDF herunterladen (Seite 44)

Maintenance: Freshwater system

Coolant. Draining

Put a suitable collection vessel underneath the eng-

ine drain plug (1) and underneath the heat exchan-

ger drain tap (2). Remove the ﬁller cap on the heat

exchanger to let the coolant run out faster. Open the

drain plug (1) and the drain tap (2) and drain off all

coolant. Before new coolant is put in, clean the heat

exchanger as in the following paragraphs.

NOTE! Deposit old coolant at a properly designated

disposal site.

Heat exchanger. Cleaning

Cooling performance is reduced by scaling in the

heat exchanger. It should therefore be ﬂushed when

the coolant is changed.

1. Drain the coolant as above.

2. Insert a hose into the ﬁlling pipe on the heat ex-

changer. Rinse with fresh water until the water

which runs out of the drain tap and the engine

block is clean. Let all the water run out.

3. Close the drain tap and the drain plug. Fill up with

coolant to the correct level. Put the ﬁller cap back.

Coolant level. Checking and topping up

WARNING! Do not open the engine coolant

system ﬁller cap when the engine is still hot ex-

cept in an emergency. Steam or hot coolant may

spray out.

Turn the ﬁller cap to the ﬁrst stop and let any pres-

sure escape from the system before removing the

cap. Top up coolant if necessary. The level should lie

between the ﬁller neck lower edge and the level spur

(1). Reinstall the ﬁller cap.

If a separate expansion tank is installed (optional

extra), the coolant level should be between the MAX

and MIN levels on the extra expansion tank.

IMPORTANT! When ﬁlling a completely drained

system the coolant level must be checked after

an hours use because the system is self bleed-

ing. Top up if required.

MAX

M I N

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Volvo D2 Series Betreibershandbuch Seite 44