Chapter 2: Installation
39
Two line system
A typical two line steering system is shown in the following illustration.
Hydraulic fluid can be pumped into the ram in either direction depending
on the direction of the helm pump rotation. The autopilot pump is con-
nected to the system as shown.
D271-2
Two line pressurised system
Two line pressurised systems have an external pressurised reservoir. This
reduces the possibility of inducing air into the system and any sponginess
felt due to pipe expansion. The autopilot pump is connected to the system
as shown in the following illustration.
Note:
Refer to the manufacturer’s instructions on depressurising the system.
D272-2
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