b'Single-Acting Integral Backstay AdjustersHarkens integral hydraulic backstay adjuster provides the power to optimize sail shape quickly for racers and adjust mast tension for smoother furling for cruisers. The cylinder features a built-in, single-acting pump.Every unit includes a hardcoat-anodized aluminum cylinder and pump, valve, and stainless pump handle with two attachment options: 1) a roll pin, that when installed, locks the handle permanently, 2) the roll pin can be left off and the handle may be inserted when needed, but stored separately. Cylinders include a clevis pin on both ends. A fiberglass position indicator attached toHarken recommends attaching a the top clevis pin slides down the cylinder as its retracted fortoggle to the cylinders bottom clevis to repeatable tension settings. Standard eye-jaw toggles fit allaccommodate stay movement. Standard Harken cylinders and are recommended on all installations. eye-jaw toggles fit all Harken cylinders.The pressure-release knob turns clockwise to close and pump, counterclockwise to release. When closing the pump, the knob cannot be over-tightened by hand, preventing damage to the valve. Release speed depends on how far open the knob is turned. Pressure relief is factory set to prevent crew from over-tensioning the backstay. Harken integral backstay adjusters come in four sizes to fit boats 9 - 18 m (30 - 60\') with stay diameters of 5 - 10 mm (7/32 - 3/8").Supplied fiberglass position indicator provides easy visual reference to duplicate desired tension settings.For replacement position indicator assembly, order part number H-85275.Hey Jude,Jean TreadwellMaxPin center lengthGap/pinPart wireStroke (closed)* Weight**Pull force No. - Size in mm in mm in mm lb kg in mm lb kgHCI00 6BCC67/325.514.173607628.363.797/1611.137701710 - 30 HCI01 0BCC -109/32714.17307628.363.791/212.74710 3602136 HCI01 2BCC -125/16814.17360307629.724.415/815.967103043HCI01 7BCC173/89.514.17360307629.724.415/815.983903808 -*For pin center length open (PCLO) add stroke length to pin center length closed. **Rod ends (forks) included in weights.Relief valves are preset to limit max tension (pull force) to recommend rigging loads and cylinder design limits. Each cylinder provides a specific max pull force.234'