First commissioning − Cooling system
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Case 2: Engine mounted horizontally
(The threaded vent plugs  are located above the
coolant level in the expansion tank À)
In this case complete filling and venting of the
cooling system is only possible, if the cooling
system is filled via the drain / filler valve à on the
side of the crankcase.
This is carried out using a pump Ä :
1. Unscrew the threaded vent plugs Â.
2. Open the cover of the filler neck Á.
3. Connect the filler hose of the pump to the
drain / filler valve Ã.
4. Switch on the pump Ä and fill the cooling
system until coolant runs out at the filler
neck Á . Switch off the pump.
5. Screw on cap Á all the way, but do not tighten
yet.
Caution:
Overtightened caps can not be opened
again.
6. Switch the pump on again, until coolant runs
out at the threaded vent plugs  without
bubbles.
7. Switch off the pump and tighten the threaded
vent plugs Â.
8. Unscrew the pump filling hose and screw on
and tighten the locking cap on the drain filler
valve Ã.
9. Let the engine run at a speed of 1200 rpm for
approx. 15 minutes.
10.Shut down the engine.
11.The coolant level at the sight glass Å of the
expansion tank must lie at the centre of the
sight glass.
12.Check the coolant level and top up if necessary
before the next startup (with the engine cold).
To top up, carefully undo the locking cap −
relieve the pressure − then carefully open and
top up with coolant Á.
Note:
The turbochargers must not be vented
while the cooling system is being topped
up.
11.Repeat this procedure until coolant can no
longer be added.
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