3 Line Steering System Installation
HYDRAULIC CONNECTIONS FOR THREE LINE STEERING SYSTEMS
A simple schematic of the pump installation in shown in Figure 3.
Delivery Lines:
In the above diagram, Ports A and B are
the input/output ports of the pump and
must be connected to the steering lines
between the steering cylinder and the
Uniflow valve. The simplest method of
doing this is to install a tee in each of the
cylinder ports of the uniflow valve itself
and connect to these tees. 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
systems reservoir. This connection can
be made at: a helm pump, a remote
reservoir (if there is one); the return line
connecting two helm pumps; or the return
line between a pump and the Uniflow valve.
If the connection is being made directly to
the helm pump, ensure that the bleed line is
connected to the
LOWER
helm bleed port.
The connection MUST be at least six feet (2
M) from the Uniflow valve as shown above.
If the connection is too close to the Uniflow
valve, the manual steering system may not
work well.
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.
29010015V1.0(15CI & 25CI Pumps).doc
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