在检修28ZLB-70、20ZLB-70泵时,因为没有专用工具,拆卸叶轮很困难,有时甚至敲破叶片。在工作中我们发现一种不用拉力器拆叶轮的简便方法,具体步骤如下: 1.脱下进水喇叭; 2.渐渐拧松联轴器螺栓,使泵轴向下降1—1.5cm, When servicing the 28ZLB-70 and 20ZLB-70 pumps, it is difficult to disassemble the impeller because of the absence of special tools and sometimes the blades are knocked over. In the work we found a simple way to remove the impeller without a tensioner, the specific steps are as follows: 1. Take off the water horn; 2. Gradually loosen the coupling bolts, the pump shaft to drop 1-1.5cm,