Got a hayward "The Pool Cleaner" 2 wheel vacuum. Currently it is not moving forward. If I life it up a bit the wheels move very slowly. When it does the spinning its spinning just fine and at the speed you would expect. But after the spin nothing. PSI is about 10 at 2800. I removed top and everything looks normal. Nothing in there blocking anything. Any tips? Its about 6 years old. Maybe just time to replace? Thanks