Document ID: chunk:federal_register_of_legislation:F2010C00150:front:0:p11
Version: federal_register_of_legislation:F2010C00150
Segment Type: other
Provision Reference: 
Character Range: 29188–32212

possible to halt the vehicle at the fifth application, with the degree of effectiveness prescribed for secondary braking.

         5.2.4.3. However, for hydraulic braking systems with stored energy, these provisions can be considered to be met provided that the requirements of paragraph 1.3. of annex 4 to this Regulation, are satisfied.

         5.2.5. The requirements of paragraphs 5.2.2., 5.2.3. and 5.2.4. above must be met without the use of any automatic device of a kind such that its ineffectiveness might pass unnoticed through the fact that parts normally in a position of rest come into action only in the event of failure in the braking system.

5.2.6. The service braking system shall act on all the wheels of the vehicle.

         5.2.7. The action of the service braking system shall be appropriately distributed among the axles.

         5.2.8. The action of the service braking system shall be distributed between the wheels of one and the same axle symmetrically in relation to the longitudinal median plane of the vehicle. Compensation and functions, such as anti-lock, which may cause deviations from this symmetrical distribution, and functions, such as traction control, which may cause application of the brakes not directly controlled by the driver, shall be declared. [3/]

         5.2.8.1. Compensation by the electric control transmission for deterioration or defect within the braking system shall be indicated to the driver by means of the yellow warning signal specified in paragraph 5.2.21.1.2. below. This requirement shall apply for all conditions of loading when compensation exceeds the following limits:

    5.2.8.1.1. a difference in transverse braking pressures on any axle:

     (a) of 25% of the higher value for vehicle decelerations > 2m/sec2,

               (b)  a value corresponding to 25% at 2m/sec2 for decelerations below this rate.

5.2.8.1.2. an individual compensating value on any axle:

               (a) > 50% of the nominal value for vehicle decelerations > 2m/sec2,

               (b) a value corresponding to 50% of the nominal value at 2m/sec2 for decelerations below this rate.

         5.2.8.2. Compensation as defined above, is permitted only when the initial brake application is made at vehicle speeds greater than 10km/h.

         5.2.9. Malfunctions of the electric control transmission shall not apply the brakes contrary to the driver's intentions.

         5.2.10. The service braking equipment and the parking braking equipment must act on braking surfaces permanently connected to the wheels through components of adequate strength. No braking surface shall be capable of being disconnected from the wheels; however, in the case of the service braking system and the secondary braking system, such disconnection of the braking surfaces shall be permitted provided that it is only momentary, for instance, during a change of gear, and that both the service braking and the secondary braking continue to operate with the prescribed degree of