Chapter 2: Installation
37
Note:
The reversing hydraulic pumps do not require a clutch connection.
If the pump is to be used to drive a secondary steering ram, a bypass
valve will have to be fitted as shown in the following illustration.
D915-1
Talk SeaTalk CLUTCH MOTORPOWER
+–+ –
12
Power
Relay
Note:
A 5 amp relay should be used to energise the bypass valve. The
relay should have a 12V coil (taking less than 500ma) and be driven by the
clutch output on the course computer connector.
Plumbing
There are three basic types of hydraulic steering systems:
• two line system
• three line system
• two line pressurised system
Typical connection points for the autopilot pump are shown for each type.
In all cases it is strongly recommended that the steering gear
manufacturer is consulted.
All hoses used to fit the pump should match or exceed the specification of
those used in the existing steering system.
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