Maintenance of Vogelsang rotary lobe pumps
How to disassemble a VX pump

Open the cover:
Unfasten four nuts, remove the cover and you have free access to the pumping chamber. If necessary, you can also replace the wear plate of the cover at this stage.
Dismount the rotary lobes:
Unfasten the strain bolts, remove the pressure discs on the lobes. Then place the puller on the lobes and dismount them.
Remove the wear plates:
After you have removed the lobes, all you have to do is remove two screws and you can remove the wear plate at the gearbox side.
Remove the Quality Cartridge mechanical seal:
Using a simple pull-out device, you can now pull out the Cartridge mechanical seal and then replace it just as easily.
Assembly:
Insert the wear plate at the gearbox side, fasten it with two screws, install the lobes and fasten them on the shaft with pressure discs, and put the cover in place.