Ensuring Optimal Comfort in the Tractor’s Driveplace Through Proper Seat Suspension Adjustment

Tractor and self-propelled machinery drivers experience significant vibration disturbance due to work on uneven terrain. Seat suspension is usually the key mitigation measure in agricultural tractors, typically using mechanical or pneumatic systems with stiffness ad-justment based on driver mass (50–140 kg). However, this adjustment is often overlooked or improperly set, reducing its protective effect. This study examines the impact of incorrect seat suspension adjustment on vibration exposure. Two tractors of similar size and mass, but equipped with different seats, were tested under identical conditions, to assess discomfort levels. Tests were conducted on an inter-farm road at varying travelling speeds and tyre pressures. An 84 kg driver partici-pated, first with correctly adjusted suspension, then with incorrect settings, both stiffer and softer. The collected data were compared with standard vibration exposure limits, to evalu-ate the negative effects of improper adjustment. Results highlight the importance of proper seat suspension calibration in minimizing driver discomfort as well as potential health risks.