Response to The correct replacement motor for your motor model (B2854) is the Century 1.5 HP Square Flange 56Y Up Rate Motor - B2854.This is your parts diagram: Pentair / Pac Fab Challenger CHII / CFII SeriesThere are two versions of gasket kits that are compatible with Challenger, one for the High Head and one for the Medium head. If you can see your pump's model number, the CF models need the GOKIT73, the CH models use the GOKIT5 or the GOKIT5SALTIf you just want the shaft seal, instead of the whole kit you would need the Shaft Seal or the Heavy Duty Shaft Seal (For Saltwater Pools)

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