BS EN ISO 4254-6:2020 pdf download.Agricultural machinery – Safety
1 Scope
This document, to be used together with ISO 4254-1, specifies the safety requirements and their verification for the design and construction of mounted, semi-mounted, trailed and self-propelled agricultural sprayers for use with plant protection products (PPP) and liquid fertilizer application, as placed on the market by the manufacturer and designed for a single operator only. In addition, it specifies the type of information on safe working practices (including residual risks) to be provided by the manufacturer. When requirements of this document are different from those which are stated in ISO 4254‑1, the requirements of this document take precedence over the requirements of ISO 4254‑1 for machines that have been designed and built according to the provisions of this document. This document, taken together with ISO 4254-1, deals with significant hazards, hazardous situations and events relevant to sprayers and liquid fertilizer distributors when they are used as intended and under the conditions foreseeable by the manufacturer (see Annex A), excepting the hazards arising from:
— protection of the driver against spray when spraying (see Foreword);
— automatically actuated height adjustment systems;
— the environment, other than noise;
— moving parts for power transmission except strength requirements for guards and barriers.
This document is not applicable to sprayers and liquid fertilizer distributors which are manufactured before the date of publication of this document.
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 4254‑1:2013, Agricultural machinery — Safety — Part 1: General requirements
ISO 5681, Equipment for crop protection — Vocabulary
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4254-1, ISO 5681 and ISO 12100 apply.
4.4.2 Powered height adjustment
In the case of powered height adjustment systems that are manually actuated, it shall be possible to actuate the manual control from the driver’s position and the control shall be of the hold‑to‑run type. In the case of powered height adjustment systems that are automatically actuated, it shall be possible to override the system from the driver’s position. To ensure the protection of the operator against crushing and shearing hazards related to a failure of the control circuit of the height adjustment of the boom, the machine shall be fitted for those purposes with either:
a) a device which limits the maximum downward speed of the boom to 10 mm⋅s −1 (measured at the centreline of the machine) during a hydraulic failure, or
b) a device capable of stopping the boom lowering at a minimum height of 500 mm between the boom and the ground.
BS EN ISO 4254-6:2020 pdf download
