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Nexus Pumpset PF-0,3 /S
Installation Manual
Thank you for choosing a Nexus Pumpset. Through this manual we will help you install
your new Nexus product. Please read through this manual carefully before starting your
installation.
1 Introduction
The Pumpset should be connected to the boat's hydraulic steering system according to
figure 1. The Pumpset motor only operates when carrying out a rudder command. When
the boat is on course, the Pumpset stops. A variable speed motor drive adjusts optimal
rudder speed and provides for minimum power consumption and maximum rudder posi-
tioning accuracy. Most existing multiple station steering systems have lock valves, which
automatically isolate stations from each other and from the autopilot Pumpset. A lock
valve should be installed so that the helm can be isolated.
2 Installation
Note! Because most installations differ, the following items are not supplied and need to
be sourced or made locally: Support bracket for Pumpset, 4 mounting screws and wash-
ers, hydraulic fittings and piping.
2.1 Installing the Pumpset
The Pumpset is splashproof and should be mounted in a cool dry location, which mini-
mises hydraulic piping and wiring runs. The enclosed figure indicates the piping required
for the different hydraulic steering systems. The Pumpset may be mounted horizontally
(Pumpset feet down) or vertically with the pump positioned above the motor. Be certain to
leave adequate space to access the bleed screw. Four screws and washers are required
to hold the Pumpset resilient feet to the mounting surface. In any case be sure, to mount
the pumpset itself or, if not possible, the pumpset-reservoir at the highest position of the
hydraulic system.
2.2 Installing hydraulic fittings and piping
It is recommended that all fittings to be installed are aligned with the Pumpset before it is
mounted. The type of hydraulic fittings required i.e., straight or 90° angle, will depend on
the mounting position of the Pumpset and the location of piping.
Recommended size for all connections are hydraulic hoses and fittings with an inner di-
ameter of 8 mm (0.32”) minimum to reduce the drag.
Use only hydraulic hoses, suitable for a working pressure of 1,000 PSI (70bar). The hy-
draulic fittings selected must be suitable for the hydraulic hoses size used.
Note! All ports on the Pumpset are 1/4" NPT.
Pipe sealant or teflon tape is required on all male pipe thread fittings. Be certain to keep
the sealant or tape at least two threads away from the starting threads to prevent threaded
tape or sealant from contaminating the system.
INTRODUCTION