INSTALLATION
,
USE AND MAINTENANCE MANUAL
–
LC 300-420-580
REV
Via Crosera n° 50
33082 Azzano Decimo, PN (Italia)
http://www.jurop.it
e-mail: info@jurop.it
5.1. Starting-up of the pump
Lubrication
• Check oil levels in gearbox and side mounted tank.
• 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 2.5.
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.
Vacuum line
• Open all valves of the vacuum-pressure system.
• Open all gate valves and remove any possible obstacle from the
line.
5.2. Precautions when starting the system
• Check oil levels in gearbox and side mounted tank.
• Check that all protection devices are correctly installed.
• Check that there are no obstacles in the vacuum line.
• Check rotation direction: open all system valves and start running
slowly.
Do not rotate in the wrong direction: this may
damage the vacuum pump. Follow the arrow
indicated on the front flange.
• Check which position of the four-way integrated valve lever allows
vacuum or pressure functioning.
• Close the valve and increase vacuum rate (or operating pressure).
• Check that the lubricating pump works properly. Oil must regularly
drip into the oilers. Typically (with degree of vacuum > 50%), 35-40
drops/min (at maximum speed).
• Check loading and operating speed for vibrations or unusual
noises.
This vacuum pump is designed to work at
maximum speed, but for longer operating we
recommend the pump be run at working speed
(see par. 2.3).
• Prepare adequately transmission.
5.3. Operating precautions
• Run the vacuum pump at a room temperature of -20°C e +40°C.
• Do not make the vacuum pump overheat: maximum air
temperature on exhaust (or delivery) side: 150°C.
• Do not operate the pump without lubrication: it may cause quick
wear and possible breakdown of vanes.
• Do not start running the pump under load: this may damage the
drive system or the hydraulic motor.
• Check the rotation speed: it must never exceed the operating limits
indicated on the identification plate of the vacuum pump.
• Do not accidentally operate the pump in the wrong direction: it may
break the vanes.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Do not convey the exceeding delivery outlet towards the suction
port, otherwise it will sack warm gas.
• Control the air flow by adjusting the rotation speed: do not use the
pressure relief valve to discharge the exceeding flow.
• Once the needed vacuum rate has been reached, we recommend
reducing the vacuum pump speed to its working speed (see par. 2.3):
this allows keeping the achieved vacuum/pressure rate constant. The
pump speed can also be reduced to values lower than the working
speed during the tank discharging phase (with the 4-way valve in
pressure mode) without increasing the draining time.
• Thus, exhaust temperature is reduced, vane durability is increased
and both oil consumption and power absorption are reduced.
Once the needed vacuum rate has been reached,
we recommend reducing the vacuum pump
speed to its working speed.
• Internal wash-up is necessary after prolonged inactivity, after
working in dusty environments or in case of accidental suction of
liquids. Such operation must be carried out only on cooled pumps.
1. Disconnect the exhaust silencer, if possible;
2. Start running the pump at low speed;
3. Suck some water (about 1-2 litres) through the inlet port;
4. Then suck oil (about 1 litre) to complete the wash-up and lubricate
internal components.
In case the exhaust line cannot be disconnected,
drain the liquids accumulated in the separator of
the exhaust silencer.
• After long periods of inactivity, introduce some quantity of oil
through the suction connection before starting the pump.
Recommended operation in case of temperatures close or below 0°C
degrees.
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