Division 2.2.1.18.7

The pressure in the supplementary line shall fall from its maximum value to 0⁺³⁰⁰ kPa within the following second after the parking braking system control device has been fully actuated.

In order to check the evacuation time the supplementary line of the towed vehicle simulator according to point 3.6.2.1 of Annex III is connected to the supplementary line of the tractor.

The accumulators of the simulator are then charged to the maximum value generated by the tractor with the engine running and the bleeding device (point 1.1 of Appendix 2 of Annex III) fully closed.