1
Check that all hoses and clamps are undamaged
and intact.
2
Check the coolant level in the expansion tank.
3
Replace the filler cap with 9996441 Cover, with
connecting nipple. Connect 9996662 Pressure
testing kit to the cap. Connect compressed air to
the equipment and open the cock. Adjust the
pressure to 70 kPa (0.7 bar) with the adjuster
knob. Then close the tap.
4
Pressure must not drop for a
two minute
test
period, for the cooling system to be regarded as
being free from leakage.
5
Release the excess pressure and remove the
pressure testing unit.
6
Check the coolant level in the expansion tank.
Install the regular filler cap.
7
Start the engine and check that no leakage
occurs.
Alternative 3
WARNING!
Do not open the coolant filler cap when the engine is
warm. Steam or hot fluid could spray out, causing
severe burns.
Tools:
9996662 Pressure testing kit
9996049 Draining hose
1
Check that all hoses and clamps are undamaged
and intact.
2
Check the coolant level in the expansion tank.
3
Connect 9996662 Pressure testing kit to
9996049 Draining hose and close the cock. Con-
nect the hose to the engine drain valve (
1
).
Open the cock and adjust the pressure to 70 kPa
(0.7 bar) with the adjuster knob. Then close the
tap.
4
Pressure must not drop for a
two minute
test
period, for the cooling system to be regarded as
being free from leakage.
5
Open the cock and increase the pressure until the
filler cap opens (must correspond to opening
pressure according to
Technical Data page 44
).
Reduce the pressure to 50 kPa (0.5 bar) and then
increase to 70 kPa (0.7 bar) and check that pres-
sure is maintained.
6
Remove the compressed air connection. Open
the control valve so that the pressure drops and
shut the cock when coolant runs into the drain
hose.
Remove the drain hose from the engine. Then
remove the drain hose from the test equipment
and empty the coolant from the hose.
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