Hi Guys,
I have less than two hours on a new motor as installed from Lionel.
I'm guessing that they got a bad one. Looks like she is going home AGAIN. 
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Volphin,
I don't think that's the motor, if it was the motor i think the squeak would sound a lot faster because the motor is spinning a lot faster than the wheels. That squeak is going the same speed as the wheels and side rods.
Alex
That sounds like linkage. Have you oiled it? Make sure you oil the valve guide slots under the valve guide where the valve linkage goes back and forth. loco must be lubed upside down to get the oil in this area.
Also oil where the piston goes into the steamchest, turn the wheels so the piston rod is fully extended back, then oil closest to the steam chest. Then the piston rod will push the oil into the steamchest opening it rides in.
Looking at my berk there are 13 points of motion on just one side of drive rods alone, that I lube
I'm not sure what " motor" you talking about but that certainly isn't the smoke unit motor and it sounds to slow and loud to be the can motor powering the loco.
It sounds rythmic like the linkage, as its almost in time with the chuff. Also make sure you lube the axle bushings between the back of each driver and the chassis.
Every moving point of the linkage needs a drop of oil whether or not the manual specifies each point.
FWIW I've found a "heavier" light oil like Labelle 102 works better for steamer linkage and O guage trains in general. Its stays where you put it and lasts longer.
Thanks Rick & Alex! I oiled her up and the squeak os GONE! How could I have been so foolish! I always oil up my locos, but I must have forgotton to do this one fresh from her repair... 
Have I mentioned I LOVE getting old? LOL
Sure glad this was a very simple solution. Thanks to Alex for the hades up.
I was sure it was a motor... it sounded even worse in person! I've never had an engine make such a racket! LOL But a touch of oil quieted her down and she is pulling her 18 car consist as we speak (er, type?) like a champ!
I'm glad it's fixed!!!!!
Alex
