Find great deals on for used brush hog and brush hog in Farm Implements & Attachments. Shop with confidence. John Deere Parts Lookup -John Deere-403, 503 & 603 ROTARY CUTTERS -PC2078. Property owners, agricultural producers, commercial operators and municipal contractors across the country rely on John Deere rotary cutter solutions toJOHN DEERE 403 and 503 rotary mower manual original used - $7.00. FOR SALE! Great condition has been in storage for years. 152866169199. Contains 272 pages which have been digitally scanned and reprinted from an original oem manual. Covers the 403, 503, 506, 509, 606, 609, 709, 1008, 1418,