Division 2.2

On vehicles with a maximum design speed not exceeding 30 km/h, a spring braking system may be used as a service braking system, provided that the driver can graduate its braking action.

In the case of a spring braking system used as a service braking system, the following additional requirements shall be fulfilled:

1. 2.2.1.

   F1response time requirements as laid down in section 6 of Annex III;

2. 2.2.2.

   with the spring brakes adjusted as closely as possible, it shall be possible to actuate:

   1. 2.2.2.1.

      the brake 10 times within a minute with the engine running at idle speed (brake applications distributed evenly within this period);

   2. 2.2.2.2.

      the service braking system 6 times starting with a pressure not higher than the cut-in pressure of the energy source. During this test the energy storage devices shall not be fed. In addition, any energy storage for auxiliary equipment shall be isolated.

3. 2.2.3.

   The spring brakes shall be designed in such a way that they are not subject to failure under fatigue. Thus, the manufacturer shall provide the Technical Service with appropriate endurance test reports.