This document specifies a method of determining the position of the centre of gravity of agricultural tractors. The method is applicable to agricultural tractors having at least two axles fitted with wheels or tracks.

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ISO 789-9:2018 specifies test procedures for determining the power available at the drawbar on agricultural tractors of the wheeled, track-laying or semi-track-laying type.

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ISO 789-3:2015 specifies a method of determining the turning and clearance diameters of wheeled agricultural tractors. It applies to wheeled agricultural tractors having at least two axles fitted with pneumatic tyres.

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