Patent ID: 9717180
Date: 2017-08-01
CPC Classifications: A01D,F15B

Claim:
1. A pressure control system for an agricultural vehicle having a header, a hydraulic lifting circuit configured to raise and lower the header, a hydraulic float circuit configured to float the header with respect to ground, and at least one drain tank in hydraulic communication with the hydraulic lifting circuit and the hydraulic float circuit, the pressure control system comprising: a lifting circuit control valve configured to control drainage of hydraulic fluid from the hydraulic lifting circuit to the at least one drain tank; a float circuit control valve configured to control drainage of hydraulic fluid from the hydraulic float circuit to the at least one drain tank; a user interface; and a controller; wherein the user interface is configured to receive one or more inputs to control drainage of hydraulic fluid from one or more of the hydraulic lifting circuit and the hydraulic float circuit; wherein the controller is configured to open at least one of the lifting circuit control valve and the float circuit control valve, based upon the one or more inputs received at the user interface, in order to depressurize, respectively, at least one of the hydraulic lifting circuit and the float hydraulic float circuit; and wherein the controller is configured to open the lifting circuit control valve and the float circuit control valve sequentially.