ISO 8909-2:2021 Equipment for harvesting — Forage harvesters — Part 2: Specification of characteristics and performance.
4.2.6 The engine maximum power of self-propelled forage harvesters shall be determined in accordance with the standards or test codes mentioned in ISO 8909-1:2021, 5.6.
4.2.7 The engine displacement of self-propelled forage harvesters shall be given, in litres to the nearest hundredth.
4.2.8 The turning diameter of self-propelled forage harvesters shall be determined, on a hard and level surface, in accordance with ISO 789-3, without applying the brakes. It shall he expressed in metres to the nearest hundredth. The wheelbase and the track width of the steered-wheels shall be indicated.
4.2.9 The clearance diameter of self-propelled forage harvesters shall be determined in accordance with ISO 789-3, without applying the brakes, with the harvesting header completely raised, and with the same wheelbase and the track width of the steered-wheels indicated in The clearance diameter shall be expressed in metres, to the nearest hundredth. If certain optional equipment influences this machine dimension, this equipment. and its dimensions, shall be recorded on the test report in ISO 8909-3:202 1, Clause 7.
4.2.10 For tractor-mounted or towed forage harvesters, the PTO drive-shaft class and the PTO type shall be specified in accordance with ISO 500-1. The PTO rotational frequency (540 min1 or 1 000 mm’) shall be given together with an indication of nominal power rating (see ISO 8909-1:202 1, 5.12).
The category of the tractor three-point hitch needed to raise and operate the machine shall be given in accordance with ISO 730.
4.2.11 The number of harvesting rows shall be indicated with the effective header harvesting width for row crops or maize headers (see ISO 8909-1:202 1, 5.13). Where the width between harvesting headers is adjustable, the minimum and maximum distances between row axes shall be indicated, in millimetres. In this case, the effective minimum and maximum cutting widths shall be indicated.
4.2.12 The header theoretical cutting height (see ISO 8909-1:2021, 5.14) shall be determined, to the nearest 5 mm, for the minimum and maximum working heights, at the lowest and highest working points to which the cutting means may be raised or lowered by means of the normal lift mechanism, in accordance with the manufacturer’s instructions. The header type fitted at the time of measurement shall be indicated.
For towed forage harvesters, the tractor towbar height at the attachment point shall be indicated, in millimetres.
4.2.13 If optional equipment influences the mass of the header (see ISO 8909-1:202 1, 5.15), it shall be recorded on the test report given in ISO 8909-3:2021, Clause 7.
4.2.14 Cutterbar frequency and stroke of oscillating scissor knives, determined at the furthest forward cutting edge in accordance with ISO 8909-1:202 1, 5.16 and 5.17 respectively, shall be recorded on the test report given in ISO 8909-3:202 1, Clause 7.ISO 8909-2 pdf download.