Cooling system Changing coolant Filling coolant IMPORTANT! Designation Illustration Coolant trolley Mix the coolant as specified in the section head- ed Coolant. Draining coolant 333 980 1. Remove the expansion tank cap. 2. Drain the coolant at the following two points: Lowest point of the cylinder block. The lowest point of the cooling system. IMPORTANT! When it is necessary to fill a large quantity of coolant, it must be pumped in from underneath. This is to ensure that air does not get into the cooling system, which can cause the coolant pump to overheat. 3. Close the drain taps. Environment 1.
Use a Scania coolant trolley, or other suitable equipment, to fill with coolant through the drain valve on the cylinder block. This facil- itates the venting of the engine. Avoid spillage and use a suitable container. Used coolant must be disposed of as specified in na- tional and international law. 2. Start the engine when the cooling system has been filled. Allow the engine to run for a while. Then check the coolant level and top up with coolant as necessary. 3. Air pockets may still be left in the cooling system, which will disappear after the engine has been operated for a period of time. It may, therefore, need some topping up to start with. OPM 300 en-GB 51 © Scania CV AB 2015, Sweden