Repair
WBV.PU.002.EN VX215QD V2.0
59
9.3
Rotary lobe change
Fig. 23: Rotary lobe change
Lobe weight
Before disassembly and assembly, note the weight of the lobes and use suitable hoisting gear.
Pump size 226
– weight per lobe: 41 kg
Pump size 320
– weight per lobe: 62 kg
1.
Open the QD cover (1-4)
Chap.
"Opening the QD cover".
2.
Use a lobe puller to pull the rotary lobes (6) from the upper and lower shafts in pairs.
Chap.
"How
the lobe puller works".
3.
To install the new lobes, follow the same sequence in reverse
Fig.
"Arrangement of HiFlo and
HiFlo
plus
".
4.
Close QD cover
Chap.
"Closing the QD cover".
5.
Pressurise the buffer chambers if necessary
Chap.
"Buffer chamber".