User manual Pomac PLP Lobe pump
CE/PLP (1406) EN-12 29
7.4. Draining the pump
1. Close the stop valves at discharge and suction side of the pump. In case no stop valves are
fitted, ensure that the system is drained to a level below the pump.
2. Place a collecting tank at the front of the pump, underneath the rotor case.
3. Slacken the cap nuts of the front cover.
4. Remove the cover from the rotor case, using the lever slots in the cover and a large
screwdriver as a lever.
5. Collect the liquid emerging from the rotor case into the collecting tank.
6. Tighten the cap nuts again by hand.
7.5. Oil draining
1. Place a collecting tank below the oil drain of the gearbox.
2. Unscrew the vent plug at the top of the gearbox.
3. Unscrew the drain plug at the bottom of the gearbox and drain the oil.
4. Drain the oil in the collecting tank.
5. Fit the drain plug and the vent plug to the gearbox.
Ensure that oil does not leak into the environment!
7.6. Dismantling the pump
1. Remove the coupling guard.
2. Loosen the coupling half on the pump shaft and pull it backwards.
3. If present, loosen the quench pipes from the shaft seal.
4. If present, loosen possible connections to a safety relief valve.
5. If present, loosen the steam piping from the heating jacket.
Ensure the steam supply is shut down and the heating jackets have cooled down!
6. Loosen the connections of the discharge and suction ports. Ensure the piping is
sufficiently supported!
7. Remove the retaining bolts and remove the pump from the baseplate. Pump types PLP 2, 3
and 4 are too heavy to lift by hand. Use a proper hoisting device. See paragraph 4.3 for
hoisting instructions.
7.7. Pump disassembly
See the sectional drawing with parts lists in paragraph 9.4 for explanation of the item numbers.
1. Place the pump on a work bench fit to carry the weight of the pump.
There may still be residual product in the pump or residual oil in the gearbox. Pay attention to
this and place the pump in e.g. a shallow collecting tank.
Rotor disassembly
2. Remove the cap nuts (1) and remove the front cover (3) and the O-ring (4).
3. Unscrew the retainers (5), using the key provided and remove the retainers with O-rings (6).
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