Installation Procedures

After you have completely planned the GHP 10 installation on your boat, and have satisfied all the hydraulic, mounting, and wiring considerations for your particular installation, you can begin mounting and connecting the components.

Installing the Pump (and Motor)

Install the pump by mounting it on your boat, connecting it to the hydraulic steering lines of your boat, and connecting it to the ECU.

Installing the Pump on an Unbalanced Cylinder Steering System

If your boat uses an unbalanced-cylinder steering system, consider the following before proceeding with the pump installation:

•If you have a 2.0 L or a 1.2 L pump and an unbalanced-cylinder steering system, then you must install the unbalanced kit (Garmin part number 010-11201-00) on the pump. Follow the directions on page 21 to install an unbalanced kit for use with an unbalanced- cylinder steering system.

•If you have a compact 2.1 L pump, then you must configure it for use with an unbalanced-cylinder steering system. Follow the directions on page 24 to configure the pump for use with an unbalanced-cylinder steering system.

•Do not use a legacy 2.1 L pump with an unbalanced-cylinder steering system.

Mounting the Pump

When choosing a location to mount the pump, consider the following:

•Mount the pump within 19 in. (.5 m) of the ECU.

•Mount the pump horizontally on a solid surface.

◦Mounting the pump horizontally on the floor is preferable, but you can also mount the pump horizontally on a wall.

◦If horizontal mounting is not possible, do not install the pump vertically with the pump head (containing the hose fittings) down.

•Mount the pump in a location to which you can extend the hydraulic steering lines of the boat.

To mount the pump:

1.Determine the best location for the pump on your boat, satisfying the hydraulic and wiring considerations.

2.Determine the correct type of screws for the mounting surface. Mounting screws are included with the pump, but you may need to provide different screws if the supplied screws are not suitable for the mounting surface.

3.Use the correct mounting template for your pump. The templates are provided on pages 45–46. Tape the template to the mounting location and use a center punch and hammer to mark the pilot-hole locations.

4.Drill pilot holes at the four mounting locations.

5.Use screws to mount the pump.

NOTE: To reduce noise while the autopilot is running, install a vibration-isolation mounting pad between the pump and the mounting surface.

6.Apply a spray-on corrosion blocker to the pump after it is mounted and all hydraulic and electrical connections are made.

Connecting the 2.0 L or the 1.2 L Pump to the Hydraulic Lines

Before disconnecting any hydraulic lines on your boat, consult the manufacturer of your boat or steering system. You must know how to properly prepare the hoses for removal, and you must know how to properly bleed the hydraulic system of air when you complete the connections. When adding hydraulic hose to the steering system, only use hose with machine-crimped or field-replaceable fittings that have a minimum rating of 1,000 lbf/in2.

The 2.0 L and the 1.2 L pump manifolds have two sets of hose-connector fittings, both upper and lower, to allow for different hose configurations. You can use the upper fittings, the lower fittings, or a combination of the two. Do not use Teflon tape on any hydraulic fitting. Use an appropriate thread sealant such as Loctite Pro Lock Tight multipurpose anaerobic gel, part number 51604, or equivalent, on all pipe threads in the hydraulic system.

GHP 10 Marine Autopilot System Installation Instructions

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