1. Make sure the pull down hose is COMPLETELY free of the drain pipe and all connections underneath. I Installed a small "slide/sled" at an incline- from above the wall drain pipe to the bottom of the cabinet -with slim plyboard or project board to make sure weight slides past  and downward past all underneath obstructions. 2 advanced handyman tiP:. set an extra  half sink weight attached with duct tape above the main weight. Slides back perfectly and aligns just right.