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The new and improved 7248 full follow-up steering by Kobelt is formerly known as the 7148 FFU steering module.
It reduces the manual effort required to steer a vessel while maintaining the necessary precision and responsiveness.
It receives rudder angle steering commands from a hydraulic pilot signal generated by a helm pump and
solenoid valve. This unit will control flow to the steering cylinder to ensure that rudder movement is proportional to the rudder angle steering commands. The power to move the rudder is provided by a steering hydraulic power unit.
A four-way solenoid valve provided with this unit can be controlled by either;
The coil may be supplied in either 12VDC, 24VDC or 120VAC.
Whether steered by a helm pump or an electric solenoid, pilot pressure is directed to either port
of the servo cylinder, depending on the desired steering direction. This servo cylinder, in turn,
controls the mechanical 4-way control valve to direct flow from the power steering pump to the
correct port of the steering cylinder.
When the rudders have reached the command position the feedback link returns the 4-way
control valve to its center position shutting off flow to the steering cylinder. The servo cylinder,
4-way control valve and tiller arm are mechanically interconnected by the feedback link. Feedback links provide the necessary position feedback to permit the unit to correct any differences in motion.
When solenoid valve is energized, the speed of rudder can be set by the adjustable flow control
In the event of main hydraulic pressure failure, the changeover valve will switch over to permit
direct control of the steering cylinder by the helm pump. The feedback link is designed with a
breakaway feature to mechanically disconnect the FFU power steering unit from the tiller
|Allows Autopilot Mode
|Fails Safe to Manual Mode