ComNav Marine 1420 Autopilot System
Hydraulic Connections
Next, make the appropriate hydraulic connections, according to whether you have a
Two Line or Three Line Steering System.
Hydraulic Connections for Two Line Steering Systems
2 Line Steering System Connections
Delivery Lines:
Ports A and B in the diagram above are the input/output ports of the pump and must be
connected to the steering lines coming from the steering cylinder. It does not matter
which pump port is connected to which steering line.
Compensating Line:
Port C is the compensating or bleed line, and must be connected to the steering
system's reservoir. This connection can be made at: a helm pump, the remote reservoir
(if there is one), the compensating line connecting two helm pumps, or the
compensating line connecting a helm pump to the remote reservoir. If the connection is
being made directly to a helm pump, ensure that the bleed line is connected to the
LOWER helm’s bleed port.
The compensating line MUST have a gradual rise from the pump to the connection to
the steering system. This allows air to rise out of the pump, ensuring a constant supply
of oil to the pump.
INSTALLATION OF SHUT-OFF VALVES IS RECOMMENDED (shown with )
Document PN 29010012 V1.3
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