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TYPE <br />SHALL BE <br />F iii flI e d lii n by W A ,R aies AS <br />DESCRIPTION SPECIFIED <br />Center Pin: Heavy duty, 5" diameter, hardened center pin, zinc coated. <br />Greaseable with 3 port grease journal and 5/16" wide x 3/16" deep <br />grease groove around pin. <br />Center pin is piloted into Hanger board <br />Circle Clamps: 20.5" long x 7" deep x 1" thick <br />Shaped to follow the contour of the circle <br />3/8" UHMW wear pads <br />Entire clamps must remain fully on the circle throughout the entire <br />rotation of the scraper <br />Reversing Cylinders and Hardware: Two (2) 4" x 12" double acting <br />cylinders %" #8 SAE ports <br />2" diameter Socatri 1000-cylinder rods <br />Poly -Pack seals and cast steel heads <br />3" OD x 2" ID cylinder pivot mounts <br />2" diameter hardened pivot pins, zinc coated with spiraled grease groove <br />around full pin <br />30 gpm pressure adjustable cross over relief valve <br />Hanger board shall be designed and engineered for optimum strength and <br />durability <br />V2" formed plate upper with 5" diameter center pin pilot hole <br />'/2" formed lower plate for 1" thickness full width of hanger -board <br />3.25" x .344" mechanical tube outer hinge tubes <br />3/4" thick trunnion arms <br />Outer trunnion arms are bolted to hanger -board <br />22 <br />(Circle One) <br />