MAINTENANCE PLAN 169 • Let all the work equipment safety locks engaged, apply the parking brake and do not move the gearshift lever. • Oils, filters, the coolant and the battery are considered special waste and must be collected and disposed of ac- cording to the anti-pollution regulations in force. A 2 90˚ Whenever passing from the use of water to the use of antifreeze fluids and vice versa, it is necessary to wash the circuit in order to eliminate either the oxide deposits and the limestone encrus- tations. Proceed as follows: 1 - Open the engine hood (See “3.5.1 ENGINE HOOD”). 2 - With the fluid still warm, open the radiator drain cock (2) (see Fig.
A), loosen the drain valve (3) positioned on the fil- ter carrier head and the radiator cap (1). Use 12 mm spanners. 3 - Let all the fluid flow out, tighten the valve (3) on the filter carrier head and close the radiator drain cock (2) (see Fig. B). 4 - Introduce a good scale-removing detergent in the radiator, in the quantities indicated on the package (remember that the capacity of the cooling system is approximately 14 lit- ers) and fill with water. 5 - Start the engine and let it run at high rpm for about 15 min- utes. 6 - Reduce the rotation speed to idling and drain the scale-re- moving solution through the radiator drain cock (2) (see Fig.
A), at the same time filling the radiator with running water for at least 40 minutes. 7 - Stop the engine, drain all the water, close the radiator drain cock (2) (see Fig. B) and fill the system with water or cool- ant. 8 - Start the engine and after a few minutes check the fluid lev- el in the radiator; if necessary, top up before tightening the cap (1). 9 - After draining the water from the tank (4), wash the inside of the tank and fill it with water or coolant until reaching a level included between the MIN. and MAX. marks. 10 - Close the engine hood.
RWA34770 B 2 90˚ RWA34760 RWA34770 IMPORTANT • The circuit must be washed more frequently if the water used contains a high quantity of calcium salts, that is, if the water is very hard.