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Division 1.2 Service braking performance and efficiencyX1

United Kingdom

Original text. Later amendments are not shown.

1.2.1.

Performance

During a test on a brake tester or, if impossible, during a road test, apply the brakes progressively up to maximum effort.

(a)

Inadequate braking effort on one or more wheels.

X
No braking effort on one or more wheels. X

(b)

Braking effort from any wheel is less than 70 % of the maximum effort recorded from the other wheel on the same axle. Or, in the case of testing on the road, the vehicle deviates excessively from a straight line.

X
Braking effort from any wheel is less than 50 % of the maximum effort recorded from the other wheel on the same axle in the case of steered axles. X

(c)

No gradual variation in brake effort (grabbing).

X

(d)

Abnormal lag in brake operation of any wheel.

X

(e)

Excessive fluctuation of brake force during each complete wheel revolution.

X
Item Method Reasons for failure Assessment of deficiencies
Minor Major Dangerous

1.2.2.

Efficiency

Test with a brake tester or, if one cannot be used for technical reasons, by a road test using a deceleration recording instrument to establish the braking ratio which relates to the maximum authorised mass or, in the case of semi-trailers, to the sum of the authorised axle loads.

Vehicles or a trailer with a maximum permissible mass exceeding 3,5 tonnes has to be inspected following the standards given by ISO 21069 or equivalent methods.

Road tests should be carried out under dry conditions on a flat, straight road.

Does not give at least the minimum figure as follows ( 1 ):

  1. 1..

    Vehicles registered for the first time after 1/1/2012 :

    • Category M 1 : 58 %

    • Categories M 2 and M 3 : 50 %

    • Category N 1 : 50 %

    • Categories N 2 and N 3 : 50 %

    • Categories O 2 , O 3 and O 4 :

      • for semi-trailers: 45 % ( 2 )

      • for draw-bar trailers: 50 %

X

2.

Vehicles registered for the first time before 1/1/2012 :

  • Categories M 1 , M 2 and M 3 : 50 % ( 3 )

  • Category N 1 : 45 %

  • Categories N 2 and N 3 : 43 % ( 4 )

  • Categories O 2 , O 3 and O 4 : 40 % ( 5 )

X

3.

Other categories

Categories L (both brakes together):

  • Category L1e: 42 %

  • Categories L2e, L6e: 40 %

  • Category L3e: 50 %

  • Category L4e: 46 %

  • Categories L5e, L7e: 44 %

Category L (rear wheel brake):

all categories: 25 % of the total vehicle mass

X
Less than 50 % of the above values reached. X
Item Method Reasons for failure Assessment of deficiencies
Minor Major Dangerous

Annotations

Editorial notes

X1

Substituted by Corrigendum to Directive 2014/45/EU of the European Parliament and of the Council of 3 April 2014 on periodic roadworthiness tests for motor vehicles and their trailers and repealing Directive 2009/40/EC (Official Journal of the European Union L 127 of 29 April 2014).