Note
:
The thread of the nut of the stationary bearing side has the same direction as the
direction of rotation of the shaft, when looking at the shaft against the drive side.
The impeller nuts should not be tightened now Push casing wear rings with keys
over impeller part No .2& 2a, Push neck bush (optional)Part No .63.
Sealing Cover
;
First of all, the sealing covers are completely pre-assembled. This includes the
installation of the cover neck bushes, the o-rings and the correct mounting of the
stationary seal ring. When mounting the stationary seal rings pay attention to pins
in the seal cover. If pins are incorporated, the stationary rings with their grooves
and bores must be pushed carefully over these pins.
When screwing on the covers make sure the leakage drain bores point
downwards. Here too, the sleeve nut (or the impeller nut) must not yet be
tightened and secured.
Shaft Bearings
;
After complete assembly of the rotor and bearings this structural unit will be
inserted into the pump casing lower half (part.no 1B), taking care that the half
collar of the neck bushes (part.no 63) is inserted in such a way that it is not
towering the gasket and that the fitting locking pin (part.no32) are inserted in the
grooves in the pump casing lower part. Furthermore the half collars of the neck
bushes and the wear rings have to be pushed to the casing lower part up to solid
fitting. Subsequently, the complete rotor will be centered by means of adjusting
screws which are positioned at the casted on bearing lanterns of the casing lower
part, and secured with the nuts belonging to it. Now the bearing housings are
bolted to the pump lower half. Then adjust and secure the deflector (part. no 40).
Adjustment of Impeller Center Position
After completion of the assembly the impeller must be in the centre of the pump
volute. This position is achieved with the aid of the sleeve nuts (part.n0 20&20A).
After adjustment the sleeve nuts are firmly tightened on both sides and secured
with keys and circlips. Now the radial clearance between the impeller and casing
wear ring (part 2 and 7) have to be checked.
