MAINTENANCE PLAN 4.7.1.d WASHING THE COOLING CIRCUIT DANGER Be extremely careful when carrying out this maintenance operation, since the engine must be running; one opera- tor must remain on the machine and the operators must decide the words and signals to be used in advance. As soon as the machine has been stopped the coolant is very hot and under pressure and may cause serious burns; let the engine cool down until it reaches approxi- mately 40ч45°C before starting the washing operations. Slowly loosen the radiator cap, to release the residual pressure.
168 4.7.1.c BLEEDING THE BRAKING CIRCUIT DANGER • The oil spilled on the floor may cause it to become slip- pery; immediately clean any dirty area. • 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. DANGER • The oil spilled on the floor may cause it to become slip- pery; immediately clean any dirty area. • 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. This operation is important, since it helps maintain the power and braking efficiency of the machine.
Proceed as follows: 1 - Make sure that the oil in the braking system tank (3) reaches the maximum level. 2 - Press the brake pedal thoroughly and, keeping it pressed, loosen the drain screw (1) of the relevant brake until the ped- al reaches the end of stroke. Use a 13 mm spanner. 3 - Keeping the pedal at the end of its stroke, tighten the drain screw (1). 4 - Release the brake pedal, wait for a few minutes and repeat the operations described above until no air bubbles can be noticed in the oil that flows out of the drain screw (1). IMPORTANT • When bleeding the system, apply a small pipe to the screws (1), in order to collect the oil.
• The bleeding must be carried out for both braking units, disconnecting the pedals from each other. • Frequently check the oil level in the braking system tank and top up whenever the oil is near the minimum level. • For the topping up, use only new oil of the prescribed type.