12
Three line systems
In a three line system, the hydraulic fluid flows in only one direction:
•
out of the helm pump to the ram
•
returning from the other side of the ram to the reservoir via a
common return line
The system will include a check valve block to direct all returned
fluid from the ram back to the reservoir.
Connect the autopilot pump to the steering system as shown in
Figure 7.
Check valve
Autopilot
pump
Figure 7: Autopilot pump location for three line systems
Hydraulic Pump - Installation Guide
Helm
pump
Reservoir
pipe
Ram pipes
Steering ram