Replacing the impeller kit. The seal does not slide down the shaft. Is there a sleeve on the shaft? Is there a different seal sold?
This impeller kit is correct for your unit and there is not a sleeve on the shaft. The seal that comes with the part is the one for the repair and may be tight sliding it down. You can try a little powder on the shaft to get it on.
The washing arms does not get water in them and will not spin.
You will want to check to make sure that there is power getting to the circulation motor and if there is power to the circulation motor then check to make sure that there is nothing impeding the impeller. If the impeller is clear and no damage to it then the circulation pump would need to be replaced.