This press spring applies downward force on the right-side coulter of a grain drill, maintaining consistent seed depth as the coulter follows ground contours. It sits between the metering-unit frame and the coulter arm, compressing to absorb impact from stones or uneven soil. A spring that loses its set tension allows the coulter to ride up, causing shallow or inconsistent seed placement. This original part matches the original spring rate and end-coil geometry, so the coulter arm returns to its correct working position after each deflection.