Power steering pumps The power steering pumps supply pressurized fluid to the SmartCylinders in order to steer the boat. The PCM controls a 12V DC motor that drives a small gear pump. The pump assembly has an integral fluid reservoir and pressure relief valves. The steering pumps have an integral service valve that can be opened to bypass the pumps and allow the engines to be manually repositioned. They are used for service or in the case of an emergency. SmartCylinders The SmartCylinder is a hydraulic steering cylinder fitted with a magnet and a position sensor (RFU). Each SmartCylinder can steer a single outdrive, or up to two rudders or outboard engines connected with a tie-bar. Remote-mounted steering service valves (optional) When the service valves on the power steering pumps are not easily accessible these optional remote-mounted valves can be installed in a convenient location.
11.1.2 System diagrams
The figures on the following pages illustrate the Optimus EPS system schematically. Not every possible system configuration or cylinder type can be represented here, but these figures will illustrate the key components and connections. Single-Engine Systems Figure 11-1 illustrates a single-engine EPS system with the standard dash panel. Figure 11-2 shows the same system, but with the optional CANtrak display. Multi-Engine Systems Figure 11-3 and figure 11-4 illustrate a twin-engine EPS system with single and dual control stations, respectively. A triple- or quad-engine EPS system will have the same general arrangement, with the addition of tiebar(s) to steer the additional engine(s).
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