# Commission Delegated Regulation (EU) 2015/68 of 15 October 2014 supplementing Regulation (EU) No 167/2013 of the European Parliament and of the Council with regard to vehicle braking requirements for the approval of agricultural and forestry vehicles (Text with EEA relevance), Division 5.4

Extent: E+W+S+N.I.

In the case of hydraulic-transmission inertia braking systems, the following shall be determined:
5.4.1. The reduction ratio ih measured at the mid-travel position of the control device;
5.4.2. The master cylinder output pressure p as a function of the thrust D on the drawbar and of the surface area FHZ of the master-cylinder piston, as specified by the manufacturer; the supplementary force K and the efficiency are derived from the representative curve obtained from these measurements
η H0 = 1 i h × p × F Hz D − K (see Figure 3 of Appendix 1);
5.4.3. The spare travel of the master cylinder s″, as referred to in point 2.2.19;
5.4.4. Surface area FHZ of the piston in the master cylinder;
5.4.5. Stroke sHz of the master cylinder (in millimetres);
5.4.6. Spare travel s″Hz of the master cylinder (in millimetres).

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Source: https://www.legislation.gov.uk/eur/2015/68/annex/VIII/division/5/division/5.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2015-68/annex-VIII/division-5/division-5.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.