Cheers for the feedback.. a motor gets rewound normally if the winding burn out or fault for various reasons, water inges is common on pumps, below a certain KW this is often more costly than buying new unless like mentioned, it's a special and thus becomes cost effective, it may have just had a service only, been a pump this is likely as it may have had a new seal and/or bearings it is not uncommon for seals to go especially if there is contaminants in the fluid been pumped (chemical or solid) for which the pump is not designed for or simply they have broken down with age.