Hydraulic control system for implements on agricultural tractor

摘要

The implements, coupled by hydraulic jacks to structural plates on either side of the transmission unit, are brought together or separated and moved to right or left by means of switches (S1,S2). A three-position switch (S3) selects fixed, floating or automatic adjustment. When the first switch (S1) is operated a relay (K1 or K2) is energised to activate the corresponding magnetic valves (Y1 or Y2 and Y5-Y7). The second switch (S2) closes the last three valves and activates an alternative (Y3 or Y4) to the first. The automatic setting can be activated or deactivated from the driver's cab.