Operation Manual

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© 2002
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6.3.8 Filling/Venting the Cooling
System
Unit Engine
Unit engine (6 cylinders)
● Open the cap 1 of the expansion tank.
● Place a container beneath sealing plug 2.
● Unscrew the sealing plug 2.
● Drain off coolant.
● In case of clogging, rinse the radiator through
with clear water.
● Tighten sealing plug 2.
Filling/venting the cooling system:
see section 6.3.8
Be careful when draining hot
coolant - danger of scalds!
Collect drained coolant and
dispose of according to envi-
ronmental regulations.
● Open the cap 1 of the expansion tank.
● Slowly add coolant up to the max. marking or
filler limit.
● Close the cap.
● Start the engine and warm up until the thermostat
opens, the upper coolant line warms up tangibly.
● Briefly run the engine at nominal output (fixed
setting), this rinses out any pockets.
● Switch off the engine and leave to cool down.
● Open cap 1, add coolant up to the max.
marking or filler limit and close the cap 1.
● Once the engine has been run once, check the
coolant level when the engine is cold.
If a heater is connected to the cooling
system, the heater valves must be
opened when coolant is added. De-
pending on the coolant contents and the installation
location of the heater, it may be necessary to
repeat the procedure several times.
6.3.9 Draining the Charge-Air
Cooler
● Loosen the drain plug 1 on the end of the
charge-air cooler.
● Drain off any oil residues that may be
remaining.
● Close the drain plug 1.
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6.3 Cooling System Service and Maintenance