Pump Ports and Valves
Item Description
Bypass valve. Used for hydraulic bleeding only, and must remain fully tightened during normal
operation.
Check valves. Must be reconfigured if the boat is equipped with an unbalanced cylinder (
Pump for an Unbalanced Cylinder, page 11
).
H1 and H2 ports. These are the recommended ports for connecting the pump to the helm and cylinder.
The recommended installation method uses a shut-off valve and a T-connector to split each connector
on the pump for the helm and cylinder connections (
).
C1 and C2 ports. These ports may be used instead of the H1 and H2 ports if they are more appropriate
for your installation location.
Return line port. Connects to the return port on the helm through a shut-off valve (recommended).
NOTE: The recommended installation method uses shut-off valves and T-connectors to connect the pump to
the helm and cylinder, so the pump can be removed for service while the boat retains normal steering. You can
install the pump using all five ports (connecting H1 and H2 to the helm and C1 and C2 to the cylinder), but this
type of installation is not recommended because it does not allow you to operate the steering system if you
must remove the pump for service.
Hydraulic Layouts
NOTICE
If the steering system in your boat does not match any of the hydraulic layouts in this manual and you are
unsure how to install the pump, contact Garmin Product Support.
This pump must not be installed with a steering system that has an unvented reservoir, because it will damage
the pump. Before installing the pump, you must verify that the vessel steering has a vented reservoir. Typically,
the vent hole is in the filler cap of the highest helm. If you are not clear as to whether the steering system is
vented, you should check with the manufacturer of the helm or the reservoir to verify.
Before you start the pump installation, identify the type of hydraulic steering system in your boat. Each boat is
different, and you must consider certain aspects of the existing hydraulic layout before deciding where to
mount the pump.
Before you start the pump installation, you should throughly review the hydraulic considerations for important
information on hydraulic hose and fitting types, installation methods, and thread-sealant information (
).
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