Pentair Kreepy Krauly Legend II Back-Up Valve - Gear Assembly (LX16)
The back-up valve (gear assembly) is a replacement part that was made by Pentair. The same high-quality materials used to manufacture the original factory part. Making this a genuine OEM product.
These gears are the internal parts of the back-up valve which was designed to be the feature that backs the pressure side cleaner out of any corners or edges on the pool steps which would cause the cleaner to be hung up or impeded in any way thus disrupting the cleaning process. Without it, the cleaner would be insufficient in its ability to suck and pull up dirt and debris off the surface of your pool.
These parts are assorted colors with the gears themselves being white and are housed in the center of the back-up valve, they should be located approximately 30 inches from the head of the cleaner. It will turn on every 3 minutes and 30 seconds to pull the cleaner out of tight corners or trouble spots. One great troubleshooting tip, if the cleaner is tangled up via the hoses or floating at the top of the pool water, would be to check this back-up valve to see if it is operating correctly. You can do this by pulling it out of the water to see if it's running, it should run for approximately 30 seconds, if it runs longer than this then it means the internal gears have failed and are stuck in the open position ultimately meaning they need to be replaced. just make sure you are purchasing the full assembly with the gears included, replacing just the outer case or o-ring for the gears will not correct this issue.