Raymarine Hydraulic Reversing Pump Type 0.5 - E12139

The Raymarine Type 0.5 Hydraulic Reversing Pump (E12139) is the core drive unit for smaller hydraulically steered vessels. This 12V pump acts as the "hands" of your autopilot, connecting directly to your steering lines to control the movement of your rudder or outdrive.

Precision Control for Smaller Vessels

This pump is specifically matched to the volume of your boat's steering cylinder. It is widely considered the standard choice for Volvo D4 and D6 sterndrive applications. Because it is a reversing pump, it can apply hydraulic pressure in both directions, allowing the autopilot to make the minute, precise corrections needed to hold a steady course.

• Evolution System Ready: Engineered to work seamlessly with the Raymarine ACU-100 Actuator Control Unit.

• Optimal Cylinder Match: Designed for hydraulic steering rams with a capacity between 50cc and 110cc (3.1 to 6.7 cubic inches).

• Rugged 12V Motor: Features a permanent magnet motor with an IP67 waterproof rating, making it durable enough for engine compartment installations.

• Integrated Safety: Includes built-in pilot-operated check valves that prevent the pump from being "back-driven" by the rudder or manual steering wheel.

Technical Specifications

• Part Number: E12139

• Voltage: 12V DC

• Peak Flow Rate: 1,000 cc/min (67 in³/min)

• Max Stall Pressure: 50 bar (750 psi)

• Mounting: Floor-mount design with high-quality stainless steel fittings.

• Compatible Corepacks: EV-100 Power and Evolution systems using the ACU-100.

Installation & Compatibility Tip

To ensure this is the right pump for your boat, you must verify your steering ram capacity. If your cylinder is larger than 110cc (6.7 in³), you may need the more powerful Type 1 Hydraulic Pump. Using an undersized pump can lead to sluggish autopilot response and premature wear on the motor.

Manufacturer : Raymarine
Manufacturer Part No : E12139