Self-loading agricultural harvesting machine with hydraulic control - using successive rows of control valve plates provided with two parallel supply drillings

摘要

Each supply bore is connected to an electrically switchable control valve to form the supply means for the hydraulic pressure medium. A pressure generator is provided for the supply and return lines, which are connected to the pressure regulating valve plate via a prearranged multi-way valve plate and connected via a by-pass line. The blocking part (31) for the latter is formed by a stop valve (49), the e.m. switch (55) of which can be switched off from the driving seat of the trailer (37) and is closed by switching on the switch. The pressure of the hydraulic pressure medium is thus increased and upon switching off of switch, is opened again. The pressure of the hydraulic medium is again returned to the small amount adjusted by the pressure regulating valve for the ''non-pressure circulation'' mode. USE/ADVANTAGE - No external operation for controlling blocking of by pass line required, operation being carried out from driving seat.