INSTALLATION & MAINTENACE MANUAL
RCOe2100/03.06
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4.2 – Hydraulic Connections
4.2.1 – Main Inlet Hoses Connections
In standard configuration, the motor has two ports on the rotary valve housing which may be both inlet or
outlet ports depending on the application, and 6 threaded holes.
Remove the plastic plugs from the inlet ports before connecting the hoses.
Standard Parker Calzoni threaded holes or SAE flanges (pls. refer to the “Technical Catalogue”) are supplied
upon request: these flanges have grooves for the sealing gaskets (O-Rings).
In case the application foresees rigid pipes, they must be made in drawn, polished steel and must be
connected to the flange by means of cutting-ring fittings (such as ERMETO).
We recommend not to use welded pipes; should it be necessary to use them, they must be internally
cleaned thoroughly around the welds using both mechanical means and chemical pickling so that to prevent
welding residue from entering the oil circuit.
Steel pipes must be chemically pickled and then neutralised and flushed when they show traces of oxidation
or in any case they are not perfectly clean.
4.2.2 – Drain Line Connections
The motor drain line must be connected directly to tank (without filter) by means of an ø 1/2" or ø 3/8" size
pipe, not too long and without unnecessary bends and bottlenecks. Pressure inside the motor case must not
exceed 5 bars to prevent damaging the shaft seal or 15 bar if the motor is equipped with a high pressure
shaft seal.
In order to avoid the motor case emptying, the drain line connection must be executed according to the
following instructions:
Horizontal
Installation
Use the drain port located in the highest position to ensure the perfect lubrication of the
two motor bearings.
