东方红７５／８０２拖拉机中央传动齿轮和最终传动齿轮都是易磨损件，按原大修制度规定，中央传动器的大小锥形齿轮磨损后必须成对更换，最终减速器的大小减速齿轮只要牙齿厚度磨损量超过１ｍｍ就必须更换新件。上述做法虽然能较好地保证修理质量，但在实践中将造成很大的... Dongfanghong 75/802 tractor transmission gear and the final drive gear are easy to wear parts, according to the original overhaul system provides that the size of the central gear tapered gear wear must be replaced in pairs, the final reducer size reduction gear tooth thickness Wear more than 1mm, you must replace the new parts. Although the above practices can better ensure the quality of repair, but in practice will result in a great deal ...