12 years for one shark is like a car with over 500,000 miles. You better clean her up and put her on the wall as the longest hayward shark that has ever existed...count your blessings. In 3 yrs, I had everything except the plastic shell replaced: tracks, bearings of all kinds, the handle 3 times, the entire motor, the 50 ft cord, etc. One bill would have been $485.00 if not under warranty.
I just spent another $125 dollars on more tracks, bearings of all kinds and impeller and did the work myself.