Maintenance
Cooling system
Fig. 77: Venting connection on charge air cooler
q The LT and HT coolant systems are filled completely.
Bleeding the HT coolant system:
u Open the valve cover on the HT expansion tank.
u Fill the HT expansion tank up to the “MAX” level marking.
u Open the fast coupling on the HT coolant pump.
u Vent the HT coolant system (coolant pump) until bubble free.
u Close the fast coupling.
u Open the fast coupling on the flywheel housing.
u Vent the HT coolant system (flywheel housing) until bubble free.
u Close the fast coupling.
u Open the HT connection on the venting block.
u Vent the HT coolant system (venting block) until bubble free.
u Tighten the HT connection (venting block).
u Top up the HT expansion tank up to the “MAX” level marking.
u Close the valve cover on the HT expansion tank.
Bleeding the LT coolant system:
u Open the valve cover on the LT expansion tank.
u Fill the LT expansion tank up to the “MAX” level marking.
u Open the LT connection on the venting block.
u Vent the LT coolant system (venting block) until bubble free.
u Tighten the LT connection (venting block).
u Top up the LT expansion tank up to the “MAX” level marking.
u Close the valve cover on the LT expansion tank.
Rechecking the HT/LT coolant levels:
u Start the engine.
u Operate the engine until the HT coolant temperature has reached > 60 °C (140 °F).
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KD62V12 33521030301_8_1 EN_US 2022-09
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