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- To start running the pump again only when temperature at
exhaust is below acceptable values.
• 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: that causes stress to the
drive system and the hydraulic motor.
• Check rotation speed. The vacuum pump must:
- never exceed the maximum speed: it may cause overheating;
- never run below the minimum speed: this may cause an
anomalous wear of the housing.
• 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.
• In vehicles do not direct compressor’s discharge to the intake of
the engine.
• Control the air flow by adjusting the rotation speed: do not use the
pressure relief valve to discharge the exceeding flow.
• 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 (500 rpm circa) and low
vacuum (20-30% max);
3. Suck some water (about 1-2 litres) through the inlet port;
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.
• Once the needed vacuum rate has been reached, we recommend
reducing the vacuum pump speed to its working speed (see par. 2.6):
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.
6.1 Ordinary maintenance
• Installation and maintenance must be operated only by qualified personnel wearing the proper clothes and the necessary tools as well as
protection devices.
• Use suitable protection equipment (gloves, protection glasses, boots...)
• In the following table summarizes the main controls to be performed and the frequency of intervention.
Operating Condition Maintenance Area Check 8
H
50
H
500
H
1000H
O
PERATING
Vacuum Line
Operating pressure
Check safety valve
Transmission / Pump
Rotation speed
Sound pressure level (also HDR motor)
S
TANDSTILL
Vacuum Line
Drain the oil gathered in the exhaust separator
Clean filter and vacuum line shutoff
4-way changeover valve: check and lubricate
Clean suction filter
Pump
Side mounted tank oil level
Clean fan protections
Check vanes wear
Pump’s inner washing (*)
Overall
Greasing
Check cardan shaft drive
Chack transmission pulley
(*) After operation in dusty environments, after accidental sucking of liquids inside the pump or before a long inoperativity period it is recommended to wash the pump
inside. See paragraph 5.3.
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