Increasing tire inflation pressure function

Switch the "Inflate/deflate" switch to inflate, the 3/2-way valve (33.01a) is energized and switches over. The compressed-air line from the 3/2-way valve (33.01a) to the shuttle valve (28.03) and the 2/2-way valves (45.01b) are pressurized. Then select the relevant axle or both axles with the selector switch.

Depending on the position of the selector switch, the 3/2-way valve (33.01b) are actuated electrically and switch over and therefore also open the passage to the 2/2-way valves (45.01b) to the respective axle. The air can now flow into the tires.

The tire pressures at the front and rear axle can be read off on the two pressure gauges (11.01) in the cab.