HYDRAULIC HAMMER SERVICE MANUAL GH SERIES HAMMERS GH06 GH3 GH07 GH4 GH1 GH6 GH2/GHS2 7550 Independence Drive Walton Hills, OH 44146-5541 Phone (440) 232-7900 Toll-free (800) 225-4379 Fax (440) 232-6294 © Copyright 2009 NPK Construction Equipment, Inc. www.npkce.com H055-9640A.doc 03/09 “Use Genuine NPK Parts”