Garmin GHP 10V User Manual

Do not connect the pump to the ECU until you have mounted the ECU to the boat following the procedures on 

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 pressure rating of 1,000 lbf/in

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Install the compact 2.1 L pump in-line with the hydraulic steering lines of the boat. The compact 2.1 L pump manifold has five hose-

connector fittings, three to the helm (port, starboard, and return), and two to the cylinder (port and starboard). 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.
Use the built-in bypass valve on the pump manifold when bleeding the hydraulic lines. See 

note: To avoid possible autopilot performance degradation, ensure that the built-in bypass valve on the pump manifold is fully 

closed during normal operation..

1.  Consult the hydraulic layout diagram below to determine the correct place to connect the pump to 

your hydraulic system.

2.  Depending on the hydraulic layout of your boat, alternative hydraulic installations using the compact 

2.1L pump are possible:

The C1 and H1 ports are directly connected to each other internally, and the C2 port is directly 

connected to H2. Because of this, instead of connecting the cylinder-bound hose to the C port 

and the helm-bound hose to the H port, you can leave the plugs in the C ports and use tee fittings 

to connect both the helm and cylinder hoses to the H ports. Though you should use all four ports 

for an ideal installation, this type of installation will steer the boat correctly.
If you plan to use this alternative compact 2.1L pump installation on a larger boat with long spans 

of hydraulic hose, the fitting size you choose is important. The fittings on the C ports are SAE #6, 

while the fittings on the H ports are SAE #4. Therefore, for alternative installations on larger 

boats, it is best to move the plugs from the C ports to the H ports and use tee fittings to connect 

both the helm and cylinder hoses to the larger C ports.

3.  Prepare to disconnect the hydraulic lines in your boat as specified by the manufacturer of your boat 

or steering system.

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