Advancing harmonization of national and international standards, ASABE initiated 2 projects to nationally adopt 2 recently revised international standards: ISO 500-1:2014, Agricultural tractors -- Rear-mounted PTO types 1, 2, 3 and 4 -- Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone, and ISO 500-3:2014, Agricultural tractors -- Rear-mounted PTO types 1, 2, 3 and 4 -- Part 3: Main PTO dimensions and spline dimensions, location of PTO.
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