Xylem Flygt 5520, Installation, Operation And Maintenance Manual

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b) Fit the pump housing lining in the lower part of the pump housing.
4. Assemble the pump housing:
a) Place the upper part of the pump housing on the lower part.
Make sure to leave some distance between the parts in order to fit the new greased
O-ring.
b) Fit the new greased O-ring between the upper pump housing part and the inner
lining.
Use a screwdriver in order to lift the upper pump housing part which makes it easier
to fit the new greased O-ring.
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c) Fit the gasket to the discharge outlet.
Make sure the gasket is fitted correctly to ensure that no leaks will occur.
d) Fit the screws that hold the pump housing together and tighten.
For tightening torque, see Torque values (page 34).
5. Fit the drive unit in the pump housing:
a) Fit the new greased O-ring on the top of the pump housing.
b) Place the drive unit in the pump housing.
c) Grease the pump housing screws.
d) Tighten the screws in a diagonal sequence.
For tightening torque, see Torque values (page 34).
6. Install the trimming flange unit:
a) Place the pump in a horizontal position.
b) Fit a washer to each stud.
c) Fit the trimming flange unit and its two new greased O-rings.
d) Fit a washer to each stud.
e) Fit a nut to each stud.
f) Tighten the trimming flange nuts.
For tightening torque, see Torque values (page 34).
7. Adjust the trimming flange unit:
a) Measure the distance between the impeller and the trimming flange unit.
The correct distance is 0.3 mm (0.01 in.).
b) Adjust the nuts along the studs to achieve the correct distance.
c) Tighten the trimming flange nuts.
For tightening torque, see Torque values (page 34).
8. Install the suction cover:
Maintenance
Flygt 5520 Installation, Operation, and Maintenance Manual 43