Hydraulic connections 233 Problems connecting hydraulic lines to working hydraulics circuit II Hydraulic system Power hydraulics ! Only switch on the power hydraulics when connected to an item of attached equip- ment. There is otherwise a risk of damage to the power hydraulics. You must switch off the power hydraulics when you have finished using the equip- ment and when you are transporting it. ! If a cell is activated, the corresponding hydraulic connections at the front and rear of the vehicle will be pressurised. There- fore, do not simultaneously use equipment connected at the front and rear hydraulic connections for the same hydraulic circuit. Vehicle front with circuit III :
Red hydraulic connection, pressure line, circuit III ; Red hydraulic connection, return line, cir- cuit III = Black hydraulic connection, free return Z Problem Possible causes/consequences and M Solutions The hydraulic lines of the equipment fitted cannot be connected to the hydraulic connec- tions of working hydraulics circuit II. The pressure in the hydraulic lines of working hydraulics circuit II is too high. X Switch off the engine. X Turn the key to position 2 in the ignition lock. X Vehicles with gear pump: briefly switch working hydraulics circuit II to standby mode (Y page 253). The pressure is decreased in the hydraulic line of working hydraulics circuit II.
or X Vehicles with positioning pump: briefly switch front working hydraulics circuit II (Y page 256) or side and rear working hydraulics circuit II (Y page 257) into standby mode. The pressure is decreased in the hydraulic line of working hydraulics circuit II.