2. If applicable, check that the clearance between the impeller and the insert ring is
maximum 1 mm (0.04 in.) radial. If not, send the pump for service.
The insert ring is pressed into the seal housing cover.
3. Fit the pump housing:
a) Fit a new and greased O-ring on the seal housing cover.
b) Grease the pump housing screws.
c) Raise the drive unit.
d) Place the drive unit into the pump housing.
Maintenance
Flygt 3153 Installation, Operation, and Maintenance Manual 49
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