This paper deals with the simulation of a seat suspension with a magnetorheological (MR) damper for agricultural machines. The dynamic model of the seat is a single degree of freedom model with non-linear damping characteristics and response time of the damper. In the model, three control algorithms were implementedtwo-state Skyhook, Skyhook linear approximation damper control, and Acceleration Driven Damper control. The excitation signal for the model was a real record of acceleration measured on the frame of the tractor. The suspension quality was compared using a standard deviation of acceleration. Results have proven significant improvement in suspension quality when any of the three mentioned algorithms was used.