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Tractors and machinery for agriculture and forestry. Power take-off (PTO) drive shafts and their guards. Safety Ingestion-build-47786 BS 5440-2 gives practical guidance1 Scope This document specifies safety requirements and their verification for the design and construction of power take off (PTO) drive shafts and their guards linking a tractor or self propelled machinery to the first fixed bearing of recipient machinery. It describes methods for the elimination or reduction of risks that need specific requirements including such risks arising from misuse, reasonably foreseeable by the manufacturer. It is applicable