Rules On The Technical Requirements Of Agricultural And Forestry Tractors For The Field Of Vision And Windscreen Wipers

Original Language Title: Noteikumi par tehniskajām prasībām lauksaimniecības un mežsaimniecības riteņtraktoru redzamības laukam un priekšējā stikla tīrītājiem

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Cabinet of Ministers Regulations No. 516 Riga, July 7, 2008 (pr. No 46 41) provisions concerning technical requirements for agricultural and forestry tractors for the field of vision and windscreen wipers are Issued in accordance with the Highway Traffic Act, the fourth part of article 15.1 1. determines the technical requirements of farm tractors for agriculture and forestry of the field of vision and windscreen wipers. 2. the terms used in the rules: 2.1. field of vision-all forward and to the side facing the direction in which the driver of the tractor can be seen;
2.2. reference point-the driver's eye position, traditionally assumed by one point. The reference point is located in a plane parallel to the median longitudinal plane of the tractor and that is the Centre of the seat, 700 mm above the line where that plane crosses the surface of the seat and 270 mm pelvic support away from the vertical plane, in which seat the front edge of the surface and perpendicular to the median longitudinal plane of the tractor (Figure 1, annex). It sets the reference point when the seat is not loaded and is set in a central position, indicated by the manufacturer of the tractor;
2.3. semi-circle of vision-arc, consisting of 12 m radius around point located in the horizontal plane of the road below the reference point so that the direction of travel of the tractor is in a semi-circle in front of the tractor and the diameter of the semi-circle is at right angles to the longitudinal axis of the tractor (Figure 2 of the annex);
2.4. masking effects in the semi-circle of vision-which cannot be seen owing to structural components such as roof-pillars, air intakes or exhaust device stacks and windscreen frame;
2.5. the sector of vision, the part of the field of vision bounded: 2.5.1. top-the horizontal plane passing through the reference point;
2.5.2. the path the plane – an area that is outside the semi-circle of vision, and is the continuation of the sector of the semi-circle of vision, the chord of which is 9.5 m long, perpendicular to the plane parallel to the median longitudinal plane of the tractor, which is located in the Centre of the driver's seat, and that plane is divided into two parts;
2.6. the windscreen wiper area-clear front glass outer surface area that is swept by the windscreen wiper;
2.7. agricultural and forestry tractor means any motor vehicle fitted with wheels or endless tracks and having at least two axles, the main function of which lies in its tractive power and which is specially designed to tow, push, move or power certain tools, machinery or trailers intended for agricultural or forestry use (hereinafter referred to as the tractor). Tractors can be equipped for the carriage of goods and passengers. 3. these rules apply to tractors which are fitted with pneumatic tyres and a maximum design speed of between 6 and 40 km/h. 4. Latvia shall grant EC type-approval of the tractor and the national type-approval, as well as recognize other European economic area Member States granted EC type-approval and national type-approval for tractors in accordance with the laws and regulations of agricultural or forestry tractors trailers and their components, conformity assessment, if the windscreen wipers comply with this provision in paragraph 9. 5. Tractor designed and fitted out in such a way that, while driving down the road with it and use in agriculture or forestry, the driver has an adequate field of vision in all ordinary circumstances relating to road use, as well as on the field and woods work. The field of vision is considered adequate when the driver as much as possible to see part of the two front wheels, and the field of vision test determined that the masking effects shall meet the following requirements: 5.1. masking effects exceeding 700 mm 5.2 If the masking effects due to adjacent structural components over 80 mm in width, the distance between the centres of two masking effects at least 2200 mm, measured along the chord of the semi-circle of vision;
5.3. in the semi-circle of vision is not more than six masking effects in the sector of vision, but not more than two;
5.4. outside the sector of vision, masking effects exceeding 700 mm but not exceeding 1500 mm is permissible if the components causing them cannot be redesigned or relocated. Each side two masking effects may be cumulative, if one does not masking effects exceeding 700 mm and the other 1500 mm, or may be two masking effects, if not one of them does not exceed 1200 mm. 5.5. opaque sites created by type-approved rear-view mirrors may be disregarded if the mirrors are designed so that they cannot be set up differently. 6. The field of vision test, doing one of the following tests: 6.1. procedure for determining masking effects. The tractor shall be placed on a horizontal surface (annex 2). On a horizontal support level with the reference point placed two light sources (for example, 2 x 150 W, 12 V) 65 mm apart and symmetrically in relation to the reference point. Support is swivel around its vertical axis and the axis through the reference point. To measure the masking effects, support center, such that the line joining the two light sources, is perpendicular to the line joining the masking component and reference point. Silhouette of the coatings in the masking component projecting onto the semi-circle of vision, or alternately turn on at the same time as the light source, measured in accordance with the provisions of section 2.4 (annex 3); 6.2. determination of masking effects for binocular vision in math. The acceptability of individual masking effects can be determined mathematically. Binocular vision with 65 mm for the distance between the centers of the eyes zīlīš masking effects (expressed in millimetres) is calculated using the following formula: v = b-12000 + 65 x 65, which (a) (a)-the distance in millimetres between the component obstructing vision and the reference point measured along the radius of vision, connecting the milestone, detail Center and the perimeter of the semi-circle of vision; b – expressed in mm parts width obstructing vision measured horizontally and perpendicular to the radius of visibility.
7. The provisions referred to in point 6 of the test method may be replaced by another, if it can be shown that they are equivalent. 8. for the purposes of determining the masking effects in the sector of vision, masking effects due to the frame of the windscreen and to any other obstacle, in accordance with the provisions of paragraph 5.3 below can be considered as a single effect, if the distance between the extreme of this masking effect external points does not exceed 700 mm. 9. Tractors having a windshield, also be fitted with windscreen wipers, which is a motor drive. Windscreen wipers cleared area provides undisturbed view to the front, corresponding to at least 8 m long chord of the semi-circle of vision vision of the sector. Windscreen wiper speed to at least 20 cycles per minute. Informative reference to European Union Directive provisions included in the law arising from the European Parliament and of the Council of 15 January 2008 Directive 2008/2/EC concerning agricultural and forestry tractors field of vision and windscreen wipers. Prime Minister i. Godmanis Minister of Agriculture m. Roze attachment Cabinet on July 7, 2008. Regulations No 516 of Agriculture Minister m. rose

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