FURUNO Furuno Autopilot Pump / PUMPHRP17-12 /

Description

Autopilot Pump, 12 VDC, 1.7 cubic inches per second (for Ram sizes 14 cubic inches to 25 cubic inches in volume) The PUMPHRP17-12 is a reversing pump assembly designed to interface the NavPilot series autopilot with a hydraulic steering system. The pump assembly incorporates a reversible gerotor gear pump, a two-piece gear housed in an eccentric ring. This allows for incredibly quiet, reliable, and precise operation. A hydraulic steering system consists of a hydraulic actuator and one or more steering wheel pumps, or tiller pumps. As the steering wheel (tiller pump) is turned in the port direction, hydraulic oil is pumped into the port hydraulic steering line. This oil is directed into the port side of the steering cylinder. As the cylinder moves to port, oil from the starboard side of the cylinder returns to the helm pump through the starboard hydraulic lines. One end of the cylinder is stationary and the other is connected to a tiller arm, which is connected to a rudder shaft. With this connection to the rudder arm, the linear motion of the cylinder to the port is changed to a rotary motion, which turns the rudder and steers the boat to port. Moving the steering wheel to starboard produces the same reaction with oil being pumped out of the starboard line and back through the port line. If more than one helm pump is used, a return/fill line must be installed to connect the housings of all the helm pumps. The output flow rate of the pump set determines the speed of the steering cylinder. The PUMPHRP17-12 generates 1.6 cu. in. of oil per second and requires a 12 VDC input.

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