LAMBORGHINI CHAMPION 120, Руководство по ремонту, Страница: 29 / 41

10-9
D. AUXILIARY SERVICES CIRCUIT
FUNCTION
The auxiliary services circuit sends oil under pressure to the control valves for external implements and the rear lift.
This circuit also provides pressurised oil for the optional trailer braking circuit and control valve block.
OPERATION
The gear pumps (1A) and (1B) draw oil (through filters (2)) from the rear gearbox and send it to the auxiliary service control
valve block (3) and to the rear lift control valve (4).
On tractors equipped with front axle suspension, the necessary oil is supplied by the gear pump (1A). The priority valve (5)
ensures that the front suspension control valve (6) receives only the necessary amount of oil.
On tractors equipped with the trailer braking valve, the oil required for operation of this valve is supplied by the gear pump (1B).
Priority is given to the trailer braking valve (7), from which oil then passes to the auxiliary service control valves (3) and to
the rear lift control valve (4).
1A
2
3 4
5 6
7
1B
D0001250
REAR GEARBOX
OPEN CENTRE