Brand new 8120 with 36' macdon first day in wheat and it won't feed right, if I push it a little the feeder plugs, also seems pretty noisy from the feeder. Could only do about 2.5 mph the machine could take alot more but the feeder gives up. We set the front drum in different positions but it didnt help. called dealer theyre gonna look in the AM. He said another guys having the same trouble. Any ideas?