The belt itself is good but there are no instructions anywhere including a service manual on how to replace the belt on 71b. Luckily my husband figured it out, there is a hidden screw under the plastic plug that has to be force unscrewed from the front underside of the 71b, it's not easy, basically you have to break the plug very carefully to get it loose, without destroying it. plastic frame. I won't buy the same 71b, the vacuum works fine but changing the belt shouldn't be that difficult.