Patent ID: 7661251

Claim:
An agricultural harvester, comprising: a traction unit; and a crop harvesting header coupled with said traction unit, said header including: a main frame with a right hand (RH) side and a left hand (LH) side; a RH gauge wheel movably coupled with said RH side of said main frame, and a RH hydraulic cylinder coupled between said RH gauge wheel and said main frame; a first hydraulic circuit coupled with said RH hydraulic cylinder and configured to control an operating height of said RH gauge wheel; a LH gauge wheel movably coupled with said LH side of said main frame, and a LH hydraulic cylinder coupled between said LH gauge wheel and said main frame; a second hydraulic circuit coupled with said LH hydraulic cylinder and configured to control an operating height of said LH gauge wheel, said second hydraulic circuit being independent from said first hydraulic circuit; a vertical position hydraulic cylinder associated with said header; and a third hydraulic circuit coupled with said vertical position hydraulic cylinder and configured to operate at a predetermined operating pressure, whereby a portion of a weight of said header is carried by said traction unit, said third hydraulic circuit being independent from each of said first hydraulic circuit and said second hydraulic circuit.