Cooling system
OPM 250 en-GB 52
© Scania CV AB 2022, Sweden
Draining the sea water circuit
1. Close the bottom valve on the sea water inlet
and remove the connection pipe (1) on the
outlet from the heat exchanger.
2. Remove the cover (2) from the sea water
pump to empty the pump completely.
The lowest point in the sea water circuit may be
at different points, but it is usually in the sea wa-
ter pump intake (3).
Plug the connections to prevent dirt ingress into
the engine.
Removing the charge air cooler
When the cooler core of the charge air cooler
needs cleaning, the charge air cooler must be re-
moved if there is no space behind it to take out
the cooler core.
Before starting work: Make sure that the cooling
system is empty as described earlier.
1. Remove the protective plate (1) on the
charge air cooler.
2. Remove the charge air pipe (2) between the
charge air cooler and the turbocharger. Twist
the pipe to facilitate removal.
If the turbocharger has a wastegate valve and
the charge air pipe must be removed, the pipe
bracket must be removed and the pipe must
be turned 90° upwards before the hose and
the pipe are removed.
3. Remove the charge air pipe (3) between the
charge air cooler and the inlet pipe.
4. Remove the water pipe (4) of the charge air
cooler.
5. Release the hose clamp and remove the sea
water hose (5) between the charge air cooler
and the heat exchanger.
6. Remove the charge air cooler (6).
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