Seiwa SW AP03 User Manual
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Two-Line Steering Systems
Two-line systems are by far the most common and are manufactured by many
companies world-wide. The best known types include Flexatrol, Hydrive, Marol,
Morse, Palm Beach, Seastar, Seipem, Servis, Tenfjord, Teleflex, Vetus, Wills Ridley
and Wagner.
Ram
Hydrive Helm Pum p
or sim ilar, with lock valve
Steer Pum p
Figure 3.13 Connection to a typical two-line system
Some two-line systems are supplied with a lock valve as part of the helm pump and no
additional lock valve needs to be purchased. But the lock valve is an option on, for
example, Hydrive and Vetus system. It must be used on Syten outboard systems. If a
lock valve is installed, it must be fitted as shown in Fig 3.13.
For information on other systems, including three-line and pressurised systems, please
consult the manufacturer’s data for those systems.
Installation Procedure
1.
Install the pump according to the hydraulic connection instructions,
mounting it close to the tubes connecting the helm pump and cylinder. The
pump must be mounted with its rubber foot horizontal.
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