Tramp-iron remover for a field forage harvester

AN electronic tramp-iron remover for chopped hay in pneumatic conveyors has been previously described for application in fixed installations such as barns or feed-mills.1,2 When green chopped hay is fed, however, a field harvester is the only machine that handles the hay pneumatically. The tramp-iron remover can be adapted for use on a field harvester to make a self-contained unit that is in some ways simpler than the one described earlier for fixed locations.