Balanced cylinder
Starboard fitting | Port fitting |
2.1 L pump (and motor)
C2 | C1 | Sea Star | |
|
| Power Assist | |
H2 | H1 | module | |
Return line | |||
|
|
Helm
P R S 
Port line
Return line
Starboard line
Shadow Drive
Notes:
•Power Assist module:
◦It may be necessary to remove the Power Assist module to gain access to the fittings, the hoses, and the
◦You may need to add a tee fitting in the return line at the Power Assist module to connect the pump.
•Legacy 2.1 L pump (and motor):
◦Install the pump to the steering lines between the cylinder and the Power Assist module.
◦Do not install the pump to the steering lines between the helm and the Power Assist module.
◦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 steering line.
◦Always install a length of hose between the helm and the Shadow Drive.
◦Install the Shadow Drive between the helm and the Power Assist module.
◦Do not install the Shadow Drive directly to the helm.
◦Do not install the Shadow Drive between the Power Assist module and the pump.
◦Do not install the Shadow Drive between the Power Assist module and the cylinder.
notice
Do not turn the system on until you bleed all the air from the helm, the Shadow Drive, the pump, and all the hydraulic lines. See page 34.
18 | GHP 10 Marine Autopilot System Installation Instructions |