What would cause grain to get sucked up through the sieves and out the exhaust. Doesn't do it alot. Did it once coming out of a full bin, and twice when it was just sucking a little grain thru it. Wheat and Durum. Sieves are in right, and air locks appear to be free. Have throttle locked out so it can move freely. Anyone else have this prob.
Brandt 5000 ex?
