Our 380 polaris' belt was broken. So we changed it. Now the belt is new and the wheels turn freely when we spin... but when we turn it on in the pool the wheels not turn.. any help appreciated.

I'm having a similar problem. I have a pretty new booster pump (<6 months old) and get plenty of pressure at the cleaner (out the tail and the suction jets). But the wheels don't turn. Do I just have worn parts inside? I'm going to take it apart and have a look, but I was hoping someone on here can narrow it down for me. Or let me know if this is a lost cause and something I'll have to take it in for. Any help would be much appreciated.

I really should have just opened it up first. The hose that carries water from the main feed to the front wheels had come off. It seems to have shrunk a bit over time so I replaced it. Very easy fix.