1. The drum is a wearing part, which will wear quickly after long-term use and needs to be replaced in time. The change of cutter teeth must be radial symmetry, otherwise the balance of circular rotation will be lost, which will affect the harvesting effect and grain impurity rate.
2. The rotation speed of the plate-toothed drum is low or the plate teeth are seriously worn, and the gap between the rake teeth of the conveyor chain and the bottom plate is too large or the feeding amount is too large, which causes the outlet of the plate-toothed drum and the inclined conveyor to be blocked by crops. Elimination methods: adjust the transmission ratio, increase the rotating speed of the plate tooth drum, replace the severely worn plate teeth, adjust the gap between the small rake teeth and the bottom plate within the range of 10 ~ 15 mm, reduce the harvesting speed or increase stubble to reduce feeding, so as to achieve the purpose of blocking prevention.