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Repair
60
WBV.PU.002.EN VX186QD V2.0
9.3
Rotary lobe change
Fig. 23: Rotary lobe change
1.
Open the QD cover (1-4)
Chap.
"Opening the QD cover".
2.
Use a lobe puller to pull the rotary lobes (7) 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
". When assembling solid material lobes, please note: fit an O-ring (6) on the gearbox side
and cover side of each lobe. When installing two lobe pairs, also fit an O-ring (8) between each lobe
pair. The O-rings shown in the figure (6, 8) are not present with rubberised lobes (not solid material
lobes).
4.
Close QD cover
Chap.
"Closing the QD cover".
5.
Pressurise the buffer chambers if necessary
Chap.
"Buffer chamber".