From the dependencies shown in Fig. 3 we can see that
when the tractor with front-mounted loader was traveling
without a load (with low rear tires’ pressures), front wheels
in most cases were slipping, and the rear – skidding. The
highest slip of the front wheels and skid of the rear wheels
was when the rear tire pressure was minimal, and the front
wheels – maximal. For example, front wheels were slipping
about 1.27%, and the rear wheels were skidding about
1.16%, when pressures in front and rear tires were 240
and 80 kPa respectively. When pressure values were changed
into the opposite, i.e., when pressure in the rear wheel
tires was made 240 kPa, and in the front wheel tires –
80 kPa, wheels’ interaction with the terrain also changed
– rear wheels were slipping (0.55%), and the front wheels
– skidding (0.34%). And when pressures in front and rear
tires were equal (240 kPa), front wheels were slipping about