Before modern three-point linkages became universal, early hydraulic systems were basic single-action setups used to lift heavy soil implements. High-pressure pumps replaced awkward manual hand levers that operators previously pulled to raise plows at field headlands. This hydraulic evolution reduced physical operator strain and paved the way for automated implement control. https://www.ganjingworld.com/article/1ipokaia4o73V4CnTLybnFgTX15i1c