拆卸东风-12型手扶拖拉机变速箱制动环时,可拆下变速箱后盖和第Ⅲ轴右端盖,拉出副变速杆,用木棒向右轻轻撬动第Ⅲ轴齿轮,使第Ⅲ轴右移。当轴不能再移动时,有2种拆卸方法(若制动凸轮随制动盘向右移,可从盘孔内将环推出,并将环卡在制动凸轮上):(1)将环顺环口 When removing the Dongfeng -12 tractor gearbox brake ring, remove the gearbox rear cover and the third shaft right end cover, pull out the auxiliary gear lever, gently pry the third shaft gear with the stick to the right The third axis to the right. When the shaft can no longer move, there are 2 kinds of disassembly methods (if the brake cam moves to the right with the brake disc, the ring can be pushed out of the hole, and the ring is stuck on the brake cam): (1) Shun ring mouth