HRP35 Accu-Steer


The Kobelt HRP35 Accu-Steer  series of hydraulic reversing pump set units are designed to interface hydraulic steering systems with autopilot or electric steering control systems. The output flow from the pump set determining the speed of the rudder.

It is a complete pump assembly consisting of a reversing gerotor gear pump, hydraulic lock valves, built-in pressure relief, flow control, suction, make-up check valves, a valve housing manifold and an electric permanent magnet motor.

The HRP35 works with both balanced and unbalanced cylinders. When unbalanced cylinders are used it is recommended that a vented header tank is used to allow for the expansion and contraction from the unbalanced cylinder.

The HRP pump-set is designed as an intermittently operated unit for normal steering applications. High demand applications will over work the motor and cause over heating.

The motor temperature has a maximum limit of 248ºF (120ºC). Allowing the temperature to exceed this limit will permanently damage the motor windings. The maximum oil temperature limit is 149ºF (65ºC).

This HRP35 Accu-Steer medium duty model outputs 3,5, has built in pressure relief values, factory set at 500 PSI (34 bar), available in 12 and 24V DC configurations.


Kobelt HRP Hydraulic Reversing Pump-sets are designed to interface a hydraulic steering system with electric or autopilot control. The output flow rate of the pump set determines the actuation speed of the steering cylinder.

Ideally, the location of the pump-set should satisfy the following conditions:
• Within 6 feet (1.8 m) of the steering cylinder.
• Below the steering cylinder for ease of connections and bleeding.
• Placed on a horizontal shelf or bracket.
• Not exposed to direct sunlight or any source of heat.
• Provide a foundation sturdy enough to prevent the transmission of excessive vibrations.

Features & Options

12 VDC and 24VDC Available
Rugged Compact Construction
Easy Installation
Whisper Quiet Operation
Interfaces with Most Autopilots