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Harken Hydraulics - Integral Backstay

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Harken Hydraulics - Integral Backstay

Harken’s integral hydraulic backstay adjuster provides the power to optimize sail shape quickly. The cylinder features a built-in, double-acting pump that delivers oil when the handle is both pushed and pulled. This moves oil through the system twice as fast as single-acting pumps on other integrals.

Assemblies include a hard coat-anodized aluminum cylinder and pump, valve, gauge and stainless pump handle with three attachment options: pin installs handle permanently; O-ring secures handle in the socket, but is not permanent; nonlocking handle installs without O-ring and roll pin. All pins and plugs are stainless steel. Cylinders include a clevis on both ends. Standard 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 the crew from over-tensioning the backstay.

Harken integral backstay adjusters come in four sizes to fit boats with 5 - 10 mm (7/32 - 3/8 in) wire-approximately 9 - 18 m (30 - 60’).

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