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This part of ISO 4254 specifies the safety requirements and their verification for the design and construction of self-propelled ride-on machines and mounted, semi-mounted or trailed machines used in agriculture in order to deal with the hazards which are typical for most of the machines. In addition, it specifies the type of information on safe working practices (including residual risks) to be provided by the manufacturer. This part of ISO 4254 deals with significant hazards (as listed in Annex A), hazardous situations and events relevant to this agricultural machinery used as intended and under the conditions foreseen by the manufacturer (see Clause 4) during normal operation and routine service This part of ISO 4254 is not applicable to - agricultural or forestry tractors, - aircraft, - air-cushion vehicles, - lawn and garden equipment, - machine specific components or functions, e.g. working tools and/or processes. This part of ISO 4254 is not applicable to hazards related to periodic service, machine re-configuration/converting and repairs intended to be carried out by professional service personnel, environmental hazards, road safety, or to the power take-off (PTO) drive shaft; neither is it applicable to guards of moving parts for power transmission except for strength requirements for guards and barriers (see 4.9). This part of ISO 4254 is not applicable to machines which are manufactured before the date of its publication. Not all of the hazards dealt with by this part of ISO 4254 are necessarily present on a particular machine. In addition, a machine can show specific hazards, e.g. related to the working tools and/or processes which are not dealt with by this part of ISO 4254. For any machine covered by this part of ISO 4254, the provisions of the part of ISO 4254 directly applicable to that type of machine, if available, take precedence over the provisions of this part of ISO 4254.