A male coupling half, generally installed on an implement, and a female coupling half (installed on the tractor side) can be connected and disconnected with trapped pressure up to 25 MPa on both sides. The 6 push-pull series allows to separate clean from dirt oil, draining the latter along an oil-collecting system, while redirecting the clean one into the hydraulic circuit. Same benefit is provided by rear remote blocks, which offer the absolutely best experience of connecting-disconnecting hydraulic lines thanks to the lever mechanism.