Response to Hello Kristine.  The Century 1.5 HP Square Flange 56Y Up Rate Motor - B2854 is a compatible replacement motor for the Pentair SuperFlo model 340039, Pentair Motor model 177475.  The Tune Up Kit Pentair SuperFlo/Sta-Rite SuperMax - GOKIT78 contains the seals and gaskets necessary to complete the motor change.  Attached please find the Pentair SuperFlo Pump exploded parts diagram for reference.

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