[F1 ANNEX II U.K. Braking Tests and performance of braking systems

Textual Amendments

F1 Substituted by Commission Directive 98/12/EC of 27 January 1998 adapting to technical progress Council Directive 71/320/EEC on the approximation of the laws of the Member States relating to the braking devices of certain categories of motor vehicles and their trailers (Text with EEA relevance).

2. PERFORMACE OF BRAKING SYSTEMS U.K.

2.2.

2.2.1. Service braking systems U.K.

2.2.1.1. Requirement relating to tests of category O ₁ vehicles U.K.

2.2.1.1.1. Where the provision of a service braking system is mandatory, the performance of the system shall meet the requirements laid down for category O ₂ vehicles. U.K.

2.2.1.2. Requirements relating to tests of category O ₂ vehicles. U.K.

2.2.1.2.1. If the service braking system is of the continuous or semi-continuous type, the sum of the forces exerted at the periphery of the braked wheels shall be at least X % of the maximum stationary wheel load, X having the following values: U.K.

Full trailer, laden and unladen	50
Semi-trailer, laden and unladen	45
Centre-axle trailer, laden and unladen	50.

Where the trailer is fitted with a compressed-air braking system, the pressure in the control line shall not exceed 6,5 bar (1) and the pressure in the supply line shall not exceed 7,0 bar (1) during the brake test. The test speed is 60 km/h.

A supplementary test at 40 km/h must be carried out with the laden vehicle for comparison with the Type I test result.

2.2.1.2.2. Where the braking system is of the inertia type, it shall comply with the conditions laid down in Annex VIII. U.K.

2.2.1.2.3. In addition, these vehicles shall be subjected to the Type I test. U.K.

2.2.1.2.4. In the Type I test of a semi-trailer, the mass braked by its axle(s) shall correspond to the maximum axle load(s) (not including the king pin load). U.K.

2.2.1.3. Requirements relating to the testing of category O ₃ vehicles. U.K.

2.2.1.3.1. The same requirements apply as to category O ₂ vehicles. U.K.

2.2.1.4. Requirements relating to tests of category O ₄ vehicles. U.K.

2.2.1.4.1. If the service braking system is of the continuous or semi-continuous type, the sum of the forces exerted at the periphery of the braked wheels shall be equal to at least X % of the maximum stationary wheel load, X having the following values: U.K.

full trailer, laden and unladen	50
semi-trailer, laden and unladen	45
centre-axle trailer, laden and unladen	50.

Where the trailer is fitted with a compressed air braking system, the pressure in the control line shall not exceed 6,5 bar (1) and the pressure in the supply line shall not exceed 7,0 bar (1) during the brake test. The test speed is 60 km/h.

2.2.1.4.2. In addition, the vehicles shall undergo the Type-III test. U.K.

2.2.1.4.3. In the Type-III test of a semi-trailer, the mass braked by the latter's axle(s) shall correspond to the maximum axle load(s).] U.K.

(1)

[F1 The pressures specified here and in the following Annexes are relative pressures measured in bars.]

Textual Amendments

F1 Substituted by Commission Directive 98/12/EC of 27 January 1998 adapting to technical progress Council Directive 71/320/EEC on the approximation of the laws of the Member States relating to the braking devices of certain categories of motor vehicles and their trailers (Text with EEA relevance).