We also purchased a newer water tower, but a 6-14086 from eBay. Looks perfect, all parts there, spout drops - but after one trial where water actually moved, the next time a few minutes later, and with the kids present - no motor noise or water lowering, just the spout dropping. I took the tower apart (no easy job, had to empty all the water, and carefully remove the tank with all the hoses and circuit boards in there) and removed the pump motor and gearbox assembly. Pulling this apart showed that the previous owner must have left the water in there for quite some time, and there's rust on the motor shaft and into the end of the motor. We really like this accessory, but need a replacement motor and gearbox (or even just the motor, if I can get it out of the white plastic gearbox). I cannot find the part number to order one. Does anyone know where a replacement can be found? e run the trains daily - will leaving colored distilled water in it case a recurrence of the problem?