B) Belt drive
Pic. 4.7
• Install a suitable pulley on the smooth shaft as close as possible
to the pump: max 35 mm.
• Apply an adequate belt tension (see manufacturer’s data). Max
3000N.
• Do not use driven or driving pulleys with a pitch diameter inferior
to 180 mm. Small pulleys require a high belt tension which may cause
premature wear to the bearing or transmission troubleshooting.
• A limited speed ratio allows a longer belts life while reducing
stress on the shafts. When possible, prefer:
- Pulleys with a pitch diameter bigger than the one indicated;
- Motors or power take-offs with a speed similar to the one of the pump.
Pump Drive min. pulley p. diam. T. max Belts Max. Speed Max. Pressure Max. Vacuum.
LC300 180 mm 3000 N SPB x 3 1300 rpm 2 bar abs 92%
LC420 180 mm 3000 N SPB x 3 1300 rpm 2 bar abs 92%
LC580 180 mm 3500 N XPB x 3 1200 rpm 1,5 bar abs 95%
C) Hydraulic drive
Model Displacement
Operating pressure
(max. vac.)
Operating pressure
(1 rel. bar)
Flow
Max pressure
draining line
Max. pressure
motor exhaust
Max pressure
LC300 61 cc/rev 125 bar 150 bar 83 l/min (1300rpm) 5 bar 5 bar 200 bar
LC420 72 cc/rev 135 bar 175 bar 98 l/min (1300rpm) 5 bar 5 bar 200 bar
LC580 108 cc/rev 140 bar 190 bar 136 l/min (1200rpm) 5 bar 5 bar 220 bar
• Fluid: mineral oil for hydraulic systems in compliance with ISO/DIN.
Temperature Optimum viscosity ale Max. viscosity allowed
-20 / +80 °C 12 – 100 cSt 750 cSt
• Filtration: class 19/16 contamination according to ISO 4406 to be
obtained with a ßx = 75 filter.
• Check circuit connections: they must be applied in the same
rotation direction as that indicated by the arrow on the pump front
flange.
Pic. 4.8
• Draining: connect directly to the tank above the maximum oil
level. Operating without draining line may damage the motor.
• 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.
Pic. 4.9
1 Hdr pump 4 Oil filter
2 Distributor 5 * Heat exchanger
3 Hdr motor 6 * Safety valve
* optional components
KEEP AXELS PARALLEL
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