The wheels on my Polaris 380 (w/ 3/4hp booster pump) do not turn at all (0RPM) when I hold it out of the water (causing it to get stuck climbing). The bag, propulsion, and tail jets all work very well. I have removed the outer shell while the unit was under pressure and observed that, when submerged, very little water appears to be coming from the jet that powers the turbine (not nearly as much as the other jets), though I don't know if that's a problem or just the way it's designed. The jet is not clogged.
I have tried the following, with no success:
1. Replaced both bearings in two of the wheels
2. Tightened the belts driving those wheels
3. Replaced the pressure relief valve
4. Removed the backup valve (just to test, it changed nothing)
5. Fixed all hose leaks (a few bad swivels)
6. Cleaned the entire interior, checked for interior hose leaks and cracks, made sure all jets were unclogged and there was no debris inside.
7. Bored the turbine jet a little bit
I am wondering what my next steps should be.
As far as I can see it, either:
1. The water pressure is good, but there is resistance in the drivetrain (bad bearings?) preventing the turbine from spinning
2. The pressure is too low, and the other jets provide less resistance and so get all the power
Hoping that someone with more experience can help me debug this.
btw the original problem that started this is the polaris gets stuck trying to climb the walls/get from the deep end to shallow end.