Delovna zavora mora omogočati nadzor gibanja traktorja in varno, hitro in učinkovito zaustavitev traktorja pri katerikoli konstrukcijsko določeni hitrosti in z dovoljeno obremenitvijo, na klancih pri vzponu in spustu.
The service brake must enable the motion of the tractor to be controlled and the tractor to be stopped safely, quickly and efficiently, at any design speed and with the authorized load on both up and down gradients.