The Janssen mechanism is a complex mechanical system known for its nonlinear behavior. This mechanism consists of multiple interconnected bars, which collectively produce a walking motion. One of the key characteristics of the Janssen mechanism is that the walking motion is not linearly related to the lengths of the bars. Instead, the movement is governed by intricate geometric relationships and interactions between the bars. The walking motion performance is influenced by three geometrical requirements: walking stability (KC1), walking length (KC2), and assembly condition (KC3). This mechanism is an eight-link, one-degree-of-freedom planar linkage with three movement loops. In this study, we focus on one movement loop. The datasets are the results of multiple Monte Carlo simulations aimed at analyzing the impact of dimensional variations of the thirteen bars in the Janssen mechanism on the fulfilment of three geometrical requirements. These results were utilized to test various tolerance allocation strategies.