Owners manual can be found here: 8500 X3: infinitymassagechairs.com/content/docs/manuals/8500_X3_Manual.pdf 8500: infinitymassagechairs.com/content/docs/manuals/IT8500SeriesManual.pdf If you have questions about assembling this chair, please call (603) 910-5000, and press the extension number for Tech Support, where one of our tech representatives will gladly assist you over the phone.