PVR EU 45 - Oil Change; Coupling Elastic Element Replacement; Exhaust Filters Replacement

Operating and maintenance instructions
EN
16
LI 718.06
6.2 Oil change
For a correct operation, oil change should be done when the pump is still warm.
ATTENTION:
Use protective gloves to avoid injury caused by heat.
Please refer to Figure 8, section 5.6. Unscrew the oil filling plug (E) and the discharge
plug (G) only after having placed below the pump tank a suitable container (proper size
and shape) for collecting the total quantity of oil.
Once the oil in tank has completely been discharged from the tank, re-assemble both
plugs (“E” and “G”) and let the pump run under vacuum for about one minute, so that
the lubricating/cooling line gets emptied and any oil residual keeps inside the pump.
Then remove the plugs and discharge the rest of the oil.
If the oil is polluted or if some water is in the oil, clean the pump by letting it run with a
suitable quantity of oil (up to the minimum level shown on the tank) at maximum vacuum
level for at least 5 minutes.
Drain the oil again.
Fill the pump with fresh oil (please see “commissioning” and “recommended oil table”).
6.3 Coupling elastic element replacement
Please refer to Figure 9.
Remove the motor assembly (pos. D1) unscrewing the screws (pos. D2). Check the elastic
element (pos. D) conditions. If necessary, replace it. Re-assemble by screwing the screws.
ATTENTION:
please use suitable lifting equipment.
Weight expected for the electric motor between 14 and 22 Kg
NOTE:
the operation with damaged elastic element causes an anomalous pump noise,
especially when starting the pump and may lead to coupling and pump shaft failure.
6.4 Exhaust filters replacement
Very dirty exhaust filters may cause a considerable pump temperature increase and in
extreme cases oil lubricant spontaneous ignition.
Maximum allowed pressure in the tank is 0,6 bar measured at the maximum capacity
(when the pump is working with the inlet open to atmospheric pressure).
If a pressure gauge has been fitted on the tank, check the exhaust filter blockage with
the pump warm.
To replace the filter, remove the cover (pos. B2) by unscrewing its screws (pos. B1).
Unscrew the screw (pos. B4), remove the washers (pos. B5-B6) and then the fixing
cartridge disk (pos. B7).
Replace all the exhaust filters (pos. B) and their O Rings (pos. B8). Re-assemble the
fixing cartridge disk, the washers and tighten the screws.
Re-assemble the discharge cover. If necessary, replace the gasket (pos. B3).