Vogelsang VX Series, Manual

Page: 142 / 202

Service Manual
Service Manual
Pump Models:
VX Series Q Pumps
Remove Rotary Lobes
Note: Take care to insure the
pump oil chambers have been
drained prior to removing lobes.
Remove the 4 door retention nuts
and washers, and place in a safe
place for re-use (
Fig. 2 ).
Using an open-end wrench,
carefully free the door from its
groove in the housing, remove,
and set aside.
The pump end plate, sometimes
referred to as the door, can be
heavy. Use care removing it
from the fluid end of the pump.
The pump end plate will also
consist of the outer wear plate
and may retain the sealing
o-ring. Remove as a unit. Inspect
the wear plate and replace if
necessary (
Fig. 3 ).
Note: Some wear is expected on
the outer wear plate. Excessive
wear means pump flow is no
longer satisfactory. Hardened
plates are coated on just one
side, thus turning the plate over
only temporarily improves pump
performance.
Fig. 2
Fig. 3