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Agricultural vehicles - Mechanical connections between towed and towing vehicles - Part 4: Dimensions of piton-type coupling
ISO 6489-4:2004 specifies the dimensional requirements for the piton-type coupling devices used in the attachment to agricultural towing vehicles of towed, non-balanced trailers and implements equipped with a coupling ring specified in ISO 5692-1.
Its purpose is to ensure the interchangeability of the mechanical connections on agricultural towing vehicles.
It is applicable only in those cases where the vertical static load does not exceed 30 kN.
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