customer service   product videos and brochures Contact OREGON® for answers to your technical and product questions. Mechanical-Harvester (chain, bars, sprockets and accessories): 1-800-223-5168 technicalservices3@oregonchain.com       Manuals: Harvester Application Guide Oregon® Mechanical Timber Harvesting Handbook.       Product Literature 18HX Harvester Chain Double-Ended Pond & Deck/Slasher Bars     Video See the Hahn HFP160 firewood processor equipped with an OREGON® Harvester Bar and Chain in action.