Hy-Pro Drive Autopilot Hydraulic Steering Components

To facilitate simple installation of reversing pumps, Hy-ProDrive offer a range of fittings to accommodate many hose/thread sizes. Each kit consists of 3 pump fittings and seals.

The motors fitted to the PR+, ML+40 and HS+ systems are rated to IP67 and sealed for life*. When the time comes for replacement the complete motor is changed. They can be replaced in-situ with no loss of oil or allowing air into the system. The kits come complete with spare face seal, coupling and bolts. * 4000+ hours in average use.

The HS+ hydraulic steering systems are designed specifically for marine secondary steering applications. They are available with either a 2.5 lpm reversing pump or a number of sizes of PC pump. The systems are protected from rudder strikes by integral relief valves. A solenoid clutch is also fitted so that manual mechanical steering can be used.  

The Autopilot Cylinder Unloader valve is a line mounted valve, used to bypass the hydraulic steering cylinder to enable the boat to be steered manually.  The solenoid operated valve is connected to the ’clutch’ connection of an autopilot. It is available in 12/24 V DC and can be used in systems up to 72 bar. It can be used with balanced and unbalanced cylinders.    

Manufactured specifically for marine autopilot steering applications the versatile PC constant running power units use a heavy-duty fan cooled motor coupled to optional pump sizes to deliver up to 4.5 L/min. Designed to be used for heavy duty applications on diesel powered vessels or commercial craft these units come fitted with pressure compensated flow controls, relief valve and cylinder check valves as standard.

PR+ RRV Reversing DC Hydraulic Power Unit with reservoir and relief valves.  Reversing type gear pumps driven by 12V/24V DC permanent magnet motors. Incorporated in the design are pilot operated check valves that prevent the pump being back driven by the manual steering system or rudder load.  The motors have an IP67 rating and can be removed from the pump without allowing air into the hydraulic system or fluid to escape. They can be used with both balanced and unbalanced cylinders

The PR+ range of pumps is also available with relief valves which provide independent control of the maximum pressure available at each service port. Relief valves can be fitted to either 1 or both services.  They are used in many applications worldwide including sports car suspension lifters, door and hatch openers and snow blowers.    

The marine autopilot pilot operated check valve is a line mounted valve that is used to lock steering cylinders. The G1/4 valve can also be used when a helm pump is without check valves or to prevent the autopilot pump back driving the helm wheel.  

NO (normally open) solenoid cartridges complete with either 12V/24V DC 12W coil. To suit all HyPro Drive Linear Actuators, Steering systems and Unloader Valves. They are also direct replacements for the older R3760, R3880 and R4048 cartridges (square coils).