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8 GHP 10 Marine Autopilot System Installation Instructions
Hydraulic Considerations – 2.1 L Pump
Different boats have different hydraulic considerations you must examine before mounting the pump or cutting any hoses. Before
starting the hydraulic installation, verify the type of hydraulic steering in your boat, and where to install the appropriate type of pump.
CAUTION: If the hydraulic steering of your boat does not match the hydraulic layouts in this manual, contact Garmin Product Support.
Single-Helm Boats
Notes:
2.1 L pump (and motor):
Do not use the 2.1 L pump on a system with an
unbalanced cylinder.
Mount the pump horizontally if possible. Do not
mount the pump vertically with the pump end
(hydraulic connections) down.
Shadow Drive
Mount the Shadow Drive horizontally and as
level as possible.
Install the Shadow Drive in either the port or the
starboard hydraulic line.
Always install a length of hose between the helm
and the Shadow Drive.
Install the Shadow Drive between the pump and
the helm.
Do not install the Shadow Drive directly to the
helm.
Do not install the Shadow Drive between the
pump and the cylinder.
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Balanced cylinder
Port ttingStarboard tting
2.1 L pump
(and motor)
Port line
Return line
Starboard line
Shadow drive
Helm
P R S
CAUTION: Do not turn on the system until you bleed all the air from the Power Assist module, the helm, the Shadow Drive, the pump, and
all the hydraulic lines. See page 24.