The aim of this study is to compare the location of command operations in agricultural tractors, measured through the Seat Index Point (SIP), with NBR ISO 4253 norms - accomodation of operator seat. This analysis included agricultural tractors manufactured in Brazil from all commercial brands available in the country. The clutch pedal was the command that best met the requirements of norm NBR ISO 4253 (51.4%), followed by the brake pedals (48.2%) and the accelerator pedal (14.3%). Only 23.0% of the operation posts sampled met the requirements of the norm, placing the location of the steering wheel within the limits of the optimal area specified. The best compliance with NBR ISO 4253 was found in the operation posts of New Holland models TS100, TS110 and TS120 (cab model) (100%), followed by the operation post of John Deere models 5605 and 5705 (87.5%), as well as the operation post of Massey Ferguson models MF275, MF283, MF290, MF292, MF297, MF299, MF5275, MF5285 and MF5290, (cab model).
ergonomics; operation post; safety; SIP
