Pos Description
1 Hydraulic pump
2 Distributor
3 Hydraulic motor
4 Oil filter
5 * Heat exchanger
6 * Safety valve
*: optional components
• Distributor: open-centre distributor in central idle position (vacuum pump off). It must be equipped with
an adjustable overpressure safety valve.
• Motor pipeline: outlet pipe must not be of a smaller diameter than that of the inlet port. Inlet pipes
always have a diameter smaller than outlet pipes. Choose preferably flexible pipes to avoid vibration
transmission.
• Tank: with suction pipe and return separated by baffles. If necessary, use a heat exchanger to avoid oil
heating above 70-80°C and protect it from extreme pressure with a pressure relief valve. Minimum
approximate capacity: as twice as the circulation flow.
• Starting-up: be sure that the system is well cleaned and pour oil into the tank and into the motor
housing (necessary to lubricate the internal bearings).
• Vent the circuit and adjust the overpressure safety valve to the lowest possible value.
• Check the oil tank level.
• Increase pressure and rotation speed until operating values are reached.
Lubrication.
• Fill in the oil tank to its maximum capacity.
• Check the oil level in the gear box (if the pomp is provided with it)
• In order to choose the most suitable oil, see paragraph “Lubrication”.
Cooling.
• Unscrew the vent valves on the housing and recycling pump, pour the cooling fluid through the port
near the exchanger.
• Screw the vent valves and start running the cooling system in order to expel the air bubbles inside it.
Then, adjust the level by filling up the expansion tank on the exchanger: it must be half filled
(approximately).
• The cooling system we designed has a capacity of 25-30 litres. Use a mixture of demineralised water
and antifreeze liquid at a concentration suitable to room temperature (usually between 25 and 50%).
Carefully vent the cooling circuit with the recycling pump stopped.
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