Seems like a proper size pump. Bearings typically start making noises way before they fail. If the motor isn't weather beaten and corroded or rusted then I'd take the motor apart and just replace the bearings if the disassembly is clean and easy. You can probably get bearings from the motor manufacturer or maybe even Hayward, or try McMaster.com. They have a big assortment of bearings at reasonable prices and quick shipping. While you have it apart I'd replace the seal assembly too. If you just want to replace the motor as a whole, that's easier yet.
Al