It sounds to me like the motor bearings are going south. If you can get it to a motor shop, they can change the bearings for you. Or you can put a new motor on the pump if it's worth doing. I didn't see enough of it in the picture to know what it is. The only thing I know for sure is that it's a deep well system and if your picture is right side up, it's a Sta Rite Pump. Their suction was always on the bottom as opposed to on the top like all other pump manufacturers. Sears here in the States have always sold Sta Rite pumps under their names such as Craftsman. If it's a Sta Rite, it either has a square flange or a round flange motor. The round flange is a Sta Rite exclusive which fits nobody Else's pump.