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SeaStar Power Assist: How the System Works

7-2
Selection Guide
SeaStar P/A (Power Assist) steering uses an electronically controlled
on-demand hydraulic pump to provide "Power" for your SeaStar
Hydraulic Steering system.
The SeaStar P/A system is comprised of two circuits: a hand
operated manual system, which is the control element, and a
hydraulic power pump, which is the working element.
The manual system consists of a helm pump with internal relief and
check valves, as well as a built in reservoir. Two steering lines and a
compensating line which provide a routing for fluid to transmit through
the system, and a steering cylinder which moves the steering device
on the boat from side to side
.
The power system, is an electronically controlled hydraulic pump that
boosts the fluid being sent from the helm pump to the steering cylinder
(this will result in much easier effort at the wheel—even when under
heavy loads). A compensating line connects the P/A unit to the helm
pump, allowing the P/A unit to share fluid with the helm reservoir.
The SeaStar P/A is compatible with multiple steering stations, and
with the use of an autopilot. In the event of a P/A power loss or
failure the hydraulic system will automatically revert to a manual
hydraulic system.
H1 H2
C1 C2
H1 H2
C1 C2
HELM
PUMP
STEERING
LINES
COMPENSATING
LINE
POWER
ASSIST
UNIT
POWER
ASSIST
UNIT
HELM
PUMP
STEERING
LINES
COMPENSATING
LINE
SEASTAR OUTBOARD
CYLINDER
TILLER ARM
SEASTAR INBOARD
CYLINDER
Typical installations shown
(please refer to you
cylinder installation
manual for proper hose
installation diagrams).
How the System Works
POWER ASSIST