Abstract

The objective of this study was to evaluate the vibration levels emitted by agricultural tractors with different capacities, comparing the results with the current norms in Brazil. The test was carried out with four tractors of different strengths - Massey Ferguson MF 4292 (engine power of 110 hp at 2,200 rpm, manufactured in 2011, and at the moment of the beginning of the tests has worked for 2,560 h), MF 4275 (engine power of 75 hp at 2,200 rpm, manufactured in 2011, and at the time of the beginning of the tests has worked for 3,036 h), MF 680 (engine power of 173 hp at 2,200 rpm, manufactured in 1997, and at the time of the beginning of the tests has worked for 9,010 h) and MF 297 (engine power of 120 hp at 2,200 rpm, manufactured in 2005, and at the time of the beginning of the tests has worked for 5,715 h). The studied tractors presented, in general, vibration levels higher than those established by International Standard Organization (ISO) 2631 for 8 h daily work, ranging between 5 and 10 Hz.

Key words: Frequency, ergonomics, personal protective equipment.