3. Make sure that the O-ring is removed from the seal housing cover.
4. Measure the trim distance:
a) Place the drive unit in the pump housing.
Make sure that the drive unit is parallel with the pump housing by hand-tightening
the pump housing screws.
b) Check the distance between the seal housing cover and the pump housing with a
feeler gauge.
Check diagonally at four points.
Maintenance
Flygt 3153 Installation, Operation, and Maintenance Manual 57
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