(2)

Annex II is amended as follows: (a) point 1.2 is replaced by the following: ‘1.2. ‘adhesion utilization curve’ means the characteristic curve of the braking force ratio without rolling resistance and normal reaction of road surface on a given axle under braking plotted against the braking rate of the vehicle.’ (b) in point 2.1.4.2, the second paragraph is replaced by the following: ‘The behaviour of vehicles of categories Tb, R2b, R3b, R4b and S2b on a road on which adhesion is reduced, shall meet the relevant requirements of Appendix 1 of this Annex or, if the vehicle is equipped with ABS, the requirements of Annex XI.’ (c) point 2.2.2.2 is replaced by the following: ‘2.2.2.2. To check compliance with the requirements of point 2.2.1.2.4 of Annex I, a Type-0 test shall be carried out with the engine disconnected at the initial speed of 30 km/h. On application of the control of the parking brake system, the mean fully developed deceleration and the deceleration immediately before the vehicle stops shall not be less than 1,5 m/s2. The same requirement applies in case of auxiliary control mentioned in point 2.2.1.2.4 of Annex I. The test shall be carried out with the laden vehicle. The force exerted on the braking control device shall not exceed the specified values.’ (d) in point 2.3.1.4, the following sentence is added: ‘As an alternative, it is also allowed to perform the test with the engine disconnected, where applicable, during brake applications.’ (e) point 2.3.2.1 is replaced by the following: ‘2.3.2.1. The service braking system of vehicles of categories R1, R2, S1, R3a, R4a and S2a; and of vehicles of categories R3b and S2b, where the sum of the technically permissible masses per axle does not exceed 10 000 kg, shall be tested in such a manner that, the vehicle being laden, the energy input to the brakes is equivalent to that recorded in the same period of time when the laden vehicle being tested is driven at a steady speed of 40 km/h on a 7 % down-gradient for a distance of 1,7 km. Alternatively, this requirement is deemed to be fulfilled for vehicles of categories R3a, R4a, S2a and for vehicles of categories R3b and S2b, where the sum of the technically permissible masses per axle does not exceed 10 000 kg, when these vehicles have passed the Type-III test according to point 2.5.’ (f) point 2.3.4.2 is replaced by the following: ‘2.3.4.2. It is ascertained that when the vehicle is driven at a constant speed of v = 60 km/h or the maximum design speed of the towed vehicle, whichever is the lower, with the brakes released the asymptotic temperatures shall not exceed a drum/disc temperature increase of 80°C, then the residual brake moments are regarded as acceptable.’ (g) point 2.5.3 is replaced by the following: ‘2.5.3. R3b and S2b where the sum of the technically permissible masses per axle does not exceed 10 000 kg.’ (h) point 3.1.1.2 is amended as follows: (i) the first paragraph is replaced by the following: ‘In the case of a tractor authorized to tow an unbraked vehicle of categories R or S, the required minimum combination performance, as required in point 3.1.1.2.1, shall be attained with the unbraked towed vehicle coupled to the tractor and with the unbraked towed vehicle laden to the maximum mass declared by the tractor manufacturer.’ (ii) the last sentence in the third paragraph is replaced by the following: ‘PM + R =combination mass (mass PM + declared unbraked towed vehicle mass PR)’ (i) in the second paragraph of point 3.1.3.3, the following indent is added: ‘— During the cooling period, the parking braking system shall not be re-adjusted manually.’ (j) in point 3.1.3.3, the following fourth paragraph is added: ‘The hot static parking braking system test may be omitted if the parking braking system acts purely on braking surfaces not used during service braking.’ (k) in point 3.1.3.4, the second paragraph is replaced by the following: ‘In the case that this requirement cannot be met due to physical limitations (e.g. limited available tyre/road adhesion for the tractor to generate sufficient braking forces or in the case that the purely mechanical parking braking system performance of the tractor as prescribed in point 3.1.3.1 is not sufficient to hold the combination) it is deemed to be fulfilled when the alternative requirement set out in point 3.1.3.4.1 of this Annex in connection with point 2.2.1.20 of Annex I is complied with.’ (l) points 3.1.3.4.1, 3.1.3.4.1.1 and 3.1.3.4.1.2 are replaced by the following: ‘3.1.3.4.1. The requirement of point 3.1.3.4 is considered to be fulfilled when the conditions set out in point 3.1.3.4.1.1 are met in the case of a towed vehicle with service brake, or when the conditions set out in point 3.1.3.4.1.2 are met in the case of an unbraked or inertia-braked towed vehicle. 3.1.3.4.1.1. Even with the tractor engine not rotating, the combination at the maximum permissible mass remains stationary on the prescribed gradient when the activation of a single control device by the driver, from his driving seat, has applied the tractor parking braking system and the towed vehicle service braking system or only the tractor parking braking system. 3.1.3.4.1.2. The tractor parking braking system can hold stationary the tractor connected to an unbraked or inertia-braked towed vehicle having a mass equal to the highest ‘combination mass PM+R’ mentioned in the test report. This mass shall be determined as follows: (a) in the case of unbraked towed vehicle: PM+R =combination mass (mass PM + declared unbraked towed vehicle mass PR) according to point 3.1.1.2; (b) in the case of an inertia braked towed vehicle: PM+R = combination mass (mass PM + declared inertia-braked towed vehicle mass as specified by the manufacturer). PM = mass of the tractor (if applicable, including any ballast or supporting load or both of them).’ (m) in point 3.2.1.3, the fifth paragraph is replaced by the following: ‘The test speed is 60 km/h or the maximum design speed of the towed vehicle, whichever is the lower.’ (n) point 3.2.3 is replaced by the following: ‘3.2.3. Automatic braking system The automatic braking performance in the event of a failure, as described in points 2.2.1.17.1 and 2.2.1.18.5 of Annex I, when testing the laden vehicle from a speed of 40 km/h or 0,8 vmax (whichever is lower), shall not be less than 13,5 % of the maximum stationary wheel load. Wheel-locking at performance levels above 13,5 % is permitted.’ (o) Appendix 1 is amended as follows: (i) point 1.1.3 is replaced by the following: ‘1.1.3. However, vehicles of the categories mentioned in point 1.1.1 and in point 1.1.2 both equipped with an anti-lock braking system of category 1 or 2 (tractors) and category A or B (towed vehicles) fulfilling the relevant requirements of Annex XI shall also fulfil all the relevant requirements of this Appendix with the following exceptions or conditions:’ (ii) the following points 1.1.5 and 1.1.6 are inserted: ‘1.1.5. The requirements of this Appendix apply to the braking equipment fitted with the largest diameter tyres intended by the manufacturer for that vehicle type. 1.1.6. Compliance with the adhesion utilisation and compatibility requirements associated with diagrams 1, 2 and 3 of this Appendix shall be demonstrated by calculation.’ (iii) section 3 is replaced by the following: ‘3. Requirements for tractors of category T 3.1. Two-axle tractors 3.1.1. For k values between 0,2 and 0,8: The provisions laid down in this point do not affect the requirements of Annex II relating to the braking performance. However, if, in tests made under the provisions of this point, braking performances are obtained which are higher than those prescribed in Annex II, the provisions relating to the adhesion utilization curves shall be applied within the areas of diagram 1 defined by the straight lines k = 0,8 and z = 0,8. 3.1.2. For all braking rates between 0,15 and 0,30: 3.1.2.1. The adhesion utilization curves for each axle are situated between two lines parallel to the line of ideal adhesion utilization given by the equation k = z +/–0,08 as shown in diagram 1 and the adhesion utilization curve for the rear axle for braking rates z > 0,3 complies with the relation: 3.1.3. For tractors authorised to tow vehicles of category R3b, R4b and S2b fitted with compressed-air braking systems: 3.1.3.1. When tested with the energy source stopped, the supply line blocked off, a reservoir of 0,5 litre capacity connected to the pneumatic control line and the system at cut-in and cut-out pressures, the pressure at full application of the braking control device shall be between 650 and 850 kPa at the coupling heads of the supply line and the pneumatic control line, irrespective of the load condition of the vehicle. 3.1.3.2. For vehicles equipped with an electric control line, a full application of the control device of the service braking system shall provide a digital demand value corresponding to a pressure between 650 and 850 kPa (see ISO 11992:2003 including ISO 11992-2:2003 and its Amd.1:2007). 3.1.3.3. These values shall be demonstrably present in the tractor when the latter is uncoupled from the towed vehicle. The compatibility bands in the diagrams specified in points 3.1.6, 4.1 and 4.2, should not be extended beyond 750 kPa and/or the corresponding digital demand value (see ISO 11992:2003 including ISO 11992-2:2003 and its Amd.1:2007). 3.1.3.4. It shall be ensured that at the coupling head of the supply line, a pressure of at least 700 kPa is available when the system is at cut-in pressure. This pressure shall be demonstrated without applying the service brakes. 3.1.4. For tractors authorised to tow vehicles of category R3b, R4b and S2b fitted with hydraulic braking systems: 3.1.4.1. When tested with the energy source at idling speed and of 2/3 of maximum engine speed, a control line of the towed vehicle simulator (point 3.6 of Annex III) connected to the hydraulic control line. At full application of the braking control device the pressures shall be between 11 500 and 15 000 kPa at the hydraulic control and shall be between 1 500 and 3 500 kPa at the supplementary line, irrespective of the load condition of the vehicle. 3.1.4.2. These values shall be demonstrably present in the tractor when uncoupled from the towed vehicle. The compatibility bands in the diagrams specified in points 3.1.6, 4.1 and 4.2, should not be extended beyond 13 300 kPa. 3.1.5. Verification of the requirements of points 3.1.1 and 3.1.2 3.1.5.1. In order to verify the requirements of points 3.1.1 and 3.1.2, the manufacturer shall provide the adhesion utilisation curves for the front and rear axles calculated by the formulae: The curves shall be plotted for both the following load conditions: 3.1.5.1.1. Unladen, not exceeding the minimum mass declared by the manufacturer in the information document; 3.1.5.1.2. Laden; where provision is made for several possibilities of load distribution, the one whereby the front axle is the most heavily laden shall be the one considered. 3.1.5.2. Special requirements in the case of tractors where all axles are permanently rigidly connected (100 % locking rate) by the all-wheel drive or are automatically connected during braking by the all-wheel drive (100 % locking rate) 3.1.5.2.1. The mathematical verification pursuant to point 3.1.5.1 is not required. 3.1.5.3. Tractors with permanent all-wheel drive other than covered by point 3.1.5.2. 3.1.5.3.1. If it is not possible, for vehicles with permanent all-wheel drive or in the condition when the all-wheel drive is connected during braking, to carry out the mathematical verification pursuant to point 3.1.5.1, the manufacturer may instead verify by means of a wheel lock sequence test that, lockup of the front wheels occurs either simultaneously with or before the lockup of the rear wheels. 3.1.5.4. However, for tractors which automatically apply the all-wheel drive when the braking is initiated above a vehicle speed of 20 km/h but not automatically connect the all-wheel drive when the service braking system is applied at speeds not exceeding 20 km/h, then it is not required to show compliance with point 3.1.5.1 for the condition when the all-wheel drive is not connected during braking. 3.1.5.5. Procedure to verify the requirements set out in point 3.1.5.3 3.1.5.5.1. The wheel lock sequence test shall be conducted with the laden and the unladen vehicle on road surfaces having an adhesion level such that wheel locking on the first axle occurs at braking rates between 0,55 and 0,8 from the initial test speed specified in point 3.1.5.5.2. 3.1.5.5.2. Test speed: 0,9 vmax, but not exceeding 60 km/h. 3.1.5.5.3. The pedal force applied may exceed the permissible actuation forces pursuant to point 3.1.1 of Annex II. 3.1.5.5.4. Pedal force is applied and increased such that the second wheel on the vehicle shall reach lockup between 0,5 and 1 s after initiating the brake application, until lockup of both wheels on one axle occurs (additional wheels may also lock during the test, e.g. in the case of simultaneous lockup). 3.1.5.5.4.1. If it is not possible during the laden test to reach lockup of the second wheel within a period of 1 s, this test may be omitted under the condition that wheel-locking under the conditions as prescribed in point 3.1.5.5.4 can be demonstrated during the unladen test. If also in the unladen test it is not possible to reach lockup of the second wheel within a period of 1 s, a third, decisive test shall be carried out on road surfaces with a coefficient of adhesion of not more than 0,3 from a test speed of 0,8 vmax km/h, but not exceeding 60 km/h. 3.1.5.5.4.2. For the purpose of the tests according to point 3.1.5.5, a simultaneous lockup of the front and rear wheels refers to the conditions when the time interval between the first occurrence of lockup of the last (second) wheel on the rear axle and the first occurrence of lockup of the last (second) wheel on the front axle does not exceed 0,3 second. 3.1.6. Tractors authorized to draw towed vehicles 3.1.6.1. The permissible relationship between the braking rate TM/FM and the pressure pm shall lie within the areas shown on diagram 2 for all pressures between 20 and 750 kPa (in the case of compressed air braking system) and 350 and 13 300 kPa (in the case of hydraulic braking system). 3.2. Tractors with more than two axles The requirements of point 3.1 shall apply to vehicles with more than two axles. The requirements of point 3.1.2 with respect to wheel lock sequence shall be considered to be met if, in the case of braking rates between 0,15 and 0,30, the adhesion utilised by at least one of the front axles is greater than that utilised by at least one of the rear axles.’ (iv) point 6.1 is replaced by the following: ‘6.1. Vehicles which meet the requirements of this Appendix by means of a device mechanically controlled by the suspension of the vehicle shall be marked in accordance with the requirements laid down in Article 24 of Delegated Regulation (EU) 2015/208 and with the appropriate data to show the useful travel of the device between the positions corresponding to vehicle unladen and laden states, respectively, and any further information to enable the setting of the device to be checked.’ (v) in point 6.3, the second sentence is replaced by the following: ‘An example of the markings for a mechanically controlled device in a vehicle fitted with compressed-air or hydraulic braking system is provided in accordance with the requirements laid down in Article 5 of Commisison Implementing Regulation (EU) 2015/504 (*1). (*1) Commission Implementing Regulation (EU) 2015/504 of 11 March 2015 implementing Regulation (EU) No 167/2013 of the European Parliament and of the Council with regard to the administrative requirements for the approval and market surveillance of agricultural and forestry vehicles (OJ L 85, 28.3.2015, p. 1.).’" (vi) the title of Diagram 2 is replaced by the following: ‘Permissible relationship between braking rate TM/FM and the coupling head pressure pm for tractors of categories T and C with compressed air or hydraulic braking systems’