FIELD: agriculture; machine building.
SUBSTANCE: invention relates to self-propelled working agricultural machine hydraulic system. Hydraulic system is equipped with pump (3) with controlled operating volume, actuated from engine (1) and supplying several hydraulic circuits. Pump (3) flow is controlled by actuator (11). Pump (3) supplies hydraulic motor (14) with working fluid by means of one discharge pipeline (7, 7a), which drives radiator fan (16). In case of pressure drop in hydraulic system, which cannot be compensated by pump (3) with controlled operating volume, radiator fan (16) power can be temporarily reduced. At that, hydraulic motor (14) operating volume can be varied by control device (1), and hydraulic system is made in form of permanent pressure system. At that to discharge pipeline (7, 7a) one pressure accumulator (21) is connected.
EFFECT: enabling device higher reliability.
11 cl, 1 dwg
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