Scrap, trying to dry the windings will be problematical.

Won’t be scrap at all. The rewinders regularly steam clean inside and outside on motors. If it had stood for some while it needs a strip and clean out and allowed to dry. Replace the bearings as a matter of choice. Motor bearings are cheap, there is nothing special about them.

If it’s seized solid chances are it’s rust between the rotor and stator. Rotor can be polished up in the lathe, stator needs a careful clean with some scotchbright.

Local gravel quarry near me floods every winter. When the water recedes the motor boys go out, pull the ends off and dry them out with a small portable space heater then pop two new bearings in and move on to the next motor.

Edited By John Stevenson on 27/10/2016 13:59:33

We had to dry many motors from flooded pits in the factory, a spell in the oven in the rewind shop soon sorted them out. I once had a large Plc panel suite flooded from an overflowing gutter in a summer downpour. Switched it off and pulled all the modules and blew out the water from the backplane with compressed air blew all the water out of the relays and contactors left a large fan blowing in panel for a couple of hours and then switched it back on all ok apart from a couple of fuses in a pilz safety module, replaced and we were good to go. The watch room often "accidentally" spilled coffee in a keyboard so they would get some peace from the bleeper system. I washed it in a bucket of water, blew it dry and put it on the radiator for half an hour, it was lovely and clean inside and out and no longer smelled of coffee, they weren't all that pleased to get it back so quickly though!

Mike

It will need more than a fan heater !

You need around 100* C for a few days at least.

Then a Megga test.

If you can borrow a dehumidifier it will dry it out better than hot air, you'll need to arrange some kind of shroud to blow the dry air through it. Of course if you heat it up as well it will be even better. Electric blanket?