6. Fasten the impeller:
a) Fit the greased washer and impeller screw.
b) Tighten the impeller screw.
For tightening torque, see Torque values (page 38).
c) Tighten it a further 1/8 turn (45°).
d) Remove the rod used to lock the impeller.
e) Fit the O-ring and flush valve cover and fasten it with screws.
For tightening torque, see Torque values (page 38).
f) Check that the impeller can rotate freely.
CAUTION:
Beware of the pinch point hazard between the rotating impeller and
the guide pin.
7. Check that the clearance between the impeller and the insert ring is 0.1–0.5 mm
(0.004–0.02 in.).
Maintenance
Flygt 3153 Installation, Operation, and Maintenance Manual 51
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