Response to Hello Jamie.  The Magnetek Century 1.5 HP Up Rate Motor model B2854 is comparable to your motor 177475-20.  It is recommended that the motor shaft seal, seal plate o-ring, and diffuser o-ring be replaced at the same time.  The GOKIT78 contains the recommended parts to complete this project.   Tune Up Kit Pentair SuperFlo/Sta-Rite SuperMax - GOKIT78

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