Bleeding The Hydraulic System - Garmin GHP 10 Manual Del Usuario

Configuring the Hydac 2.1 L Pump for an Unbalanced-Cylinder Steering Configuration
The Hydac 2.1 L pump is factory-configured for use with a balanced-cylinder steering configuration. If necessary, it can be configured to work
with an unbalanced-cylinder steering configuration. If you are unsure of the cylinder steering configuration of your boat, consult the boat
manufacturer.
NotE: The following steps are necessary only if your boat has an unbalanced-cylinder steering configuration. Be sure to follow these steps before
bleeding the hydraulic system. If you remove the check valves after bleeding the hydraulic system, you will need to bleed it again.
CaUtioN: Keep all parts clean and free of dust and debris while configuring the pump for an unbalanced-cylinder steering system.
1. Remove the check valves from the pump manifold.
2. Pull the pistons out of the pump manifold. Take note of the piston orientation as you
remove them; you will need to reverse them as part of these procedures.
3. Remove the Teflon rings.
4. Reverse the direction of the Pistons and reinsert them in the pump manifold.
5. Reinstall the check valves on the pump manifold.

Bleeding the Hydraulic System

After you install the GHP 10 autopilot system by following the GHP 10 Installation
Instructions, you must bleed the hydraulic system. In addition to the general instructions
in the following section, follow the standard bleeding recommendations provided by the
manufacturer of your helm.
General hydraulic bleeding procedures:
1. Ensure the helm reservoir is full of hydraulic fluid. Add fluid if necessary.
2. Manually steer the helm to both cylinder stops.
3. Manually steer the helm fully to port to the stop.
4. Open a bypass valve at the cylinder ports.
5. Turn the helm slowly to port for 3 minutes.
6. Close the cylinder bypass valve.
7. Check the helm reservoir level, and add fluid if necessary. Continue to perform steps 2 through 7 until the helm reservoir level remains full.
8. Open the bypass valve on the manifold of the Hydac 2.1 L pump.
9. Push the soft key on the GHC 10 for 10 seconds, watch for steering movement. If there is no movement, push the
soft key.
10. Continue to hold the soft key that produces steering movement and steer fully to the stop.
11. Steer the helm to both cylinder stops using the GHC 10.
12. Close the bypass valve on the manifold of the Hydac 2.1 L pump.
NotE: Ensure that the built-in bypass valve on the pump manifold is fully closed during normal operation to avoid possible autopilot performance
degradation.
13. C heck the helm reservoir level, and add fluid if necessary. Perform steps 2 through 7 until the helm reservoir level remains full

Check valves Check valves
Pistons Pistons
Teflon rings Teflon rings
Removing the Check Valves and Pistons Removing the Check Valves and Pistons
(Pistons Shown in a Balanced Configuration) (Pistons Shown in a Balanced Configuration)
Hydac 2.1 L Pump Installation Addendum