顿河联合收割机在我团使用4年。在使用中原车摆环头及刀杆连接处工作不可靠，间隙大，使割刀行程达不到技术要求，使作物连根拔起，导致刀杆头被旷断，摆环头及夹板掉落。针对上述情况对原机的割刀头改制使用两套180203轴承。改制的必须确定好割刀行程．然后再进行援环头的改制 Don River combine harvester used in my regiment for 4 years. In the use of the Central Plains swing head and the arbor connection at work unreliable, the gap, the knife stroke less than technical requirements, so that the crop uprooted, leading to the cutter head was excavated, swinging ring and splint drop. In view of the above situation on the original machine cutter head restructuring two sets of 180203 bearings. The restructuring must determine the good knife stroke. Then re-ring aid system restructuring