Rev. 00 of 01.01.2009
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Figure 2
4.1) HYDRAULIC MOTOR USE AND MAINTENANCE INSTRUCTIONS
In case of unidirectional motors, make sure that the motor is spinning in proper rotation. Make
sure that the assembly flange is in good alignment between the pump shaft and the motor
shaft.
OIL TANK: The capacity of the tank must be suitable for the operating conditions of the system
(about 3 times the circulating oil). To avoid overheating of the fluid, if necessary, install a heat
exchanger. In the tank, the intake and discharge ports must be spaced by a vertical panel to
prevent return oil from being immediately discharged again.
HOSES: The nominal diameter of the hoses must not be smaller than the diameter of the motor
inlets and the hoses must be perfectly sealed. We recommend use of a section of flexible hose
to reduce the transmission of vibration. All return hoses must be below the minimum level of oil,
to avoid allowing air into the circuit.
FILTERS: We recommend filtering the entire system.
HYDRAULIC FLUID: Use hydraulic fluids compliant with standards ISO/DIN. Avoid mixing
different oils as this may cause oil decomposition, reducing its lubricating power.
COMMISSIONING: Make sure that all the connections of the circuit are sealed and that the
system is clean. Pour the oil in the tank using a filter. Purge the circuit to ease the filling of the
system. Set the pressure regulating valves at the lowest possible value. Start the system for a
few seconds at minimum speed, then purge the circuit again and check for the oil level in the
tanks. If the difference of temperature between the motor and the fluid exceeds 50°F
progressively heat the system. Gradually increase the pressure and the rotation speed until the
required operating values are reached.
PERIODIC CHECKS
– MAINTENANCE: The external surface must be kept clean. Periodically
replace the filter per manufacturer’s recommendations. According to the working conditions of
the system, the oil level must be checked and it must be periodically replaced.
5. COMMISSIONING - ADJUSTMENTS
5.1 DO NOT OPERATE WITHOUT PRESSURE/VACUUM RELIEF VALVE
Before starting the vacuum pump, make sure that the pressure and vacuum relief
valves are properly mounted and set. Pressure relief valve should be set at 5 psi
of less. Vacuum relief valve should be set at 18” Hg or less.
5.2 DIRECTION OF ROTATION
Before starting the vacuum pump, make sure that the pump shaft rotates freely
and that the direction of rotation is the same as that indicated by the arrow on the
