BS ISO 6489-5:2019 pdf free.Agricultural vehicles一Mechanical connections between towed and towing vehicles.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 286-1, ISO system of limits and fits一Part 1: Bases of tolerances, deviations and fits ISO 500-1, Agricultural tractors一Rear-mounted power take-offtypes 1, 2, 3 and 4一General specifications, safety requirements, dimensions for master shield and clearance zones ISO 2768-1:1989, General tolerances- Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 5692-3:2011, Agricultural vehicles 一Mechanical connections on towed vehicles 一Part 3: Swivel hitch rings 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: 一ISO Online browsing platform: available at https://www.iso.org/obp 一IEC Electropedia: available at http://www.electropedia.org/ 3.1 non-swivel clevis coupling hitching device, not rotating around the horizontal longitudinal axis (roll), for the mechanical connection of trailers and implements 3.2 coupling reference centre point along the pin centreline crossing the horizontal symmetry centreline of the drawbar housing 6 Design requirements 6.1 The coupling unit shape shall allow the swivel hitch ring the following minimum angles: 一+60° in the horizontal plane (yaw), 一+20° in the vertical plane (pitch), 一+20° around its longitudinal axis (roll).6.2 Where a sub-frame is used between the agricultural tractor or towing vehicle and the coupling, this shall be tested with the appropriate coupling, according to the maximum coupling capacity. 6.3 The non-swivel clevis coupling unit shall be provided with a device to prevent unintentional uncoupling. This device shall be easy to apply, 一retained on the hitch unit, and 一tested by the application of a static load of 0,25D. 6.4 The clevis shall be designed for the D values specified in Table 1. 7 Location The non-swivel clevis coupling shall be located as shown in Figure 2, mounted in the plane of the tractor’s or towing vehicle’s longitudinal axis. The centre of the non-swivel clevis coupling shall be located at the distance, t, rearwards from the end of the power take-off (PTO) shaft, in accordance with Table 2. The coupling shall be located as high as possible, without any part of the clevis/ring coupling or its construction (e.g. keeper) entering the clearance zone specified for the PTO in ISO 500-1.BS ISO 6489-5 pdf download.