MAINTENANCE PRIOR TO START 24. MAINTENANCE PRIOR TO START 24.1 VISUAL CHECKS (refer to chapter "16. Preparing the Machine Start") 24.2 COOLING SYSTEM, CHECKING THE COOLANT LEVEL, TOPPING OFF COOLANT A wrong water/coolant mixing ratio will damage the radia- tor! Always mix water and coolant in the ratio 50:50. This also applies to countries with a hot climate. Danger of fire! Coolant may be ignited by a hot engine! Do not top off coolant, unless the engine has cooled down sufficiently. 1 - Open the engine hood. 2 - Check whether the coolant level in the expansion tank is be- tween the FULL and LOW markings.
If the coolant level does not reach up to the LOW marking, top off coolant when the engine is cold. 3 - Remove the cover cap of the overflow tank. 4 - Top coolant until the level reaches up to the FULL marking. 5 - After topping, firmly close the cover cap. If the expansion tank is empty again after a short period of time, immediately have the cooling system checked for leaks and have any leaks repaired in the garage. If the sub-tank must be topped, the coolant level in the cool- er has to be checked. (See chapter "27. Maintenance Every 50 Operating Hours") 141