User manual Pomac PLP Lobe pump
30 CE/PLP (1406) EN-12
4. Block the rotors against co-rotation using a proper fitting wooden or plastic dowel.
5. Remove both rotors (35) from the shafts.
Shaft seal disassembly
6. The rotary seal faces of the mechanical seals are fitted in the slots in the rotors already
disassembled. Remove these parts by lifting them carefully with e.g. a screwdriver.
! Extreme care should be taken when carrying out this procedure! Never use any
percussive tools and do not make hammer-like movements with the screwdriver!
Do the following to disassemble the other parts of the shaft seal.
7. On either side of the shaft insert a screwdriver into the holes in the sides of the rotor case,
see figure.
8. Place the tip of the screwdriver behind the tabs of the seal seat showing in the holes.
9. Carefully wriggle the seal seat with the shaft seal forward from the rotor case using both
screwdrivers at the same time.
10. Remove the seal seat with the shaft seal from the pump shaft.
11. Remove the other shaft seal in the same way.
! Keep both matching faces of a mechanical seal together when the mechanical seal is
disassembled, the faces have run in on each other and they may not be switched around!
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