Case CX490D, Operator'S Manual, Page: 261 / 370

6 - MAINTENANCE
26. Start the engine and let it run at low idle speed for
3 min . Turn on the cab heating system, and set the
temperature and the fan speed to the maximum level.
27. Gradually increase the engine speed to H position.
Let the engine run until the coolant temperature
reaches
90 °C . Make sure that coolant temperature
stays at 90 °C for some minutes.
NOTICE: if coolant temperature gets quickly over 90 °C ,
lower the engine speed to low idle. Stop the engine and
check for leakages from the hoses of the cooling system.
28. Gradually decrease the engine speed to low idle and
let it run for 3 min . Stop the engine.
29. Wait until the engine has cooled down. Slowly open
the radiator cap and check for coolant level. Add some
coolant up to the edge of the coolant inlet of the radi-
ator.
NOTICE: if too much coolant has to be added at this stage,
carefully check for leakages into the engine cooling system.
30. Close the radiator cap.
31. Carry out final filling of the coolant reserve tank up to
the FULL mark. Close the cap of the reserve tank.
NOTICE: the coolant level in the reserve tank shall be al-
ways double checked the morning after. The cooling circuit
may take some more time to get stabilized. If needed, fill
the reserve tank with coolant up to the FULL mark. Close
the cap of the reserve tank.
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