Mounting the Pump

Before you mount the pump, if your boat has an unbalanced cylinder steering system, you must re-configure the pump to work properly with the unbalanced cylinder (page 3).

1.After you select a mounting location, determine the mounting hardware needed for the surface.

Mounting hardware is included with the pump, but it may not be suitable for the mounting surface.

2.If necessary, purchase the mounting hardware.

3.Hold the pump in the intended mounting location and mark the locations of the mounting holes on the mounting surface, using the pump as a template.

4.Using a drill bit appropriate for the mounting surface and selected mounting hardware, drill the four holes through the mounting surface.

5.Secure the pump to the mounting surface using the selected mounting hardware.

Connecting the Pump to Hydraulic LinesNotice

Do not attempt to use the autopilot to steer the boat until you bleed all air from each part of the hydraulic system (page 3).

When adding hydraulic line to the system, use only hose with machine- crimped or field-replacable fittings that have a minimum rating of 1000 lbf/in2.

Do not use plumber’s tape on any hydraulic fitting. Use an appropriate thread sealant rated for marine use on all pipe threads in the hydraulic system.

Before you connect the pump to the hydraulic lines, refer to one of these diagrams to find the correct place to add the pump and fittings to the hydraulic system.

•Single helm without power assist (page 5)

•Dual helm without power assist (page 6)

•Single helm with power assist (page 7)

•Five-connector install method (page 8)

The diagrams on pages 5–7show the recommended pump installation method, with t-connectors in the hydraulic steering lines of the boat, using only three fittings on the manifold. However, it is possible to install the pump using the five-connector method shown on page 8.

Single Helm without Power Assist

1.Disconnect the necessary lines from the hydraulic system.

2.Add a t-connector to the starboard and port lines of the system.

3.Add hydraulic hose to the unused fitting on each t-connector, sufficient to connect the t-connector to the pump fittings.

4.Connect the starboard line t-connector to the H1 or H2 pump fitting.

5.Connect the port line t-connector to the H pump fitting that you did not use in step 4.

6.Install the Shadow Drive to the port or starboard hydraulic line between the helm and the t-connector.

See the installation instructions provided with your Garmin autopilot for Shadow Drive installation instructions.

7.Connect the return line from the helm to the Tank fitting of the pump.

8.Install a shut-off valve (page 2) on each hydraulic line that connects directly to the pump (optional).

9.Insert, tighten, and seal the included plugs in the unused pump fittings.

Dual Helm without Power Assist

1.Disconnect the necessary lines from the hydraulic system.

2.Add a t-connector to the starboard and port lines of the system between the helm t-connector and the steering cylinder.

3.Add hydraulic hose to the unused fitting on each t-connector, sufficient to connect the t-connector to the pump fittings.

4.Connect the starboard line t-connector to the H1 or H2 pump fitting.

5.Connect the port line t-connector to the H pump fitting that you did not use in step 4.

6.Install the Shadow Drive to the port or starboard hydraulic line between the helm t-connector and the pump t-connector.

See the installation instructions provided with your Garmin autopilot for Shadow Drive installation instructions.

7.Connect the return line from the helm t-connector to the Tank fitting of the pump.

8.Install a shut-off valve (page 2) on each hydraulic line that connects directly to the pump (optional).

9.Insert, tighten, and seal the included plugs in the unused pump fittings.

Single Helm with Power Assist

1.Disconnect the necessary lines from the hydraulic system.

2.Add a t-connector to the starboard and port lines of the system between the power assist module and the steering cylinder.

3.Add hydraulic hose to the unused fitting on each t-connector, sufficient to connect the t-connector to the pump fittings.

4.Connect the starboard line t-connector to the H1 or H2 pump fitting.

5.Connect the port line t-connector to the H pump fitting that you did not use in step 4.

6.Install the Shadow Drive to the port or starboard hydraulic line between the helm and the t-connector.

See the installation instructions provided with your Garmin autopilot for Shadow Drive installation instructions.

7.Add a t-connector to the return line between the power assist module and the helm.

8.Connect the return line from the helm to the Tank fitting of the pump.

9.Install a shut-off valve (page 2) on each hydraulic line that connects directly to the pump (optional).

10.Insert, tighten, and seal the included plugs in the unused pump fittings.

Shut-Off Valve

Garmin recommends the installation of shut-off valves on each line connected to the pump. The shut-off valves allow you to easily disconnect and remove the pump from the hydraulic system without affecting helm steering. Refer to the diagrams on pages 5–7to view ideal shut-off valve placement.

Connecting the Pump to the ECU

Before you connect the pump to the ECU, you must mount the pump (page 2) and ECU.

See the installation instructions provided with your Garmin autopilot for ECU installation instructions.

Connect the two cables from the pump to the ports on ECU marked DRIVE and FEEDBACK.

The ports are keyed to the appropriate fittings on the cables.

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2.1 L Hydraulic Pump Installation Instructions