I am new to repairing trains in general so thing might be easy. I was given the Southern diesel set several years ago by my Uncle Frank. There are many neat surprises ahead but for now my situation. I am having trouble with the back motor. I've not been able to remove the armature but was able to get it free. Before was locked solid. How should I proceed with this? I removed the brush plate to allow me to turn the armature and oil the bearings. I'm using a graphite based lubricant. The armature just isn't free enough.20191206_193708

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The armature is supported on two oilite bearings.  The small hole between the two mounting  screws is where oil can be added between the two bearings. I would suggest you tip the motor up slightly and add oil to that hole until is dripping out around the gear. Let it sit and continuing adding a little oil and see if that loosens the bearings up.  Oil usually used on older Lionel trains is a medium weight synthetic engine oil.  LaBelle 107 is the hobby version of this. 

David Johnston posted:

...I would suggest you tip the motor up slightly and add oil to that hole until is dripping out around the gear. Let it sit and continuing adding a little oil and see if that loosens the bearings up...

And then tip it the other way too to get the other bushing. I use Mobil 1 to get things moving.

You shouldn't have to remove the armature unless the bushings are worn out.

F3 Armature

Rob

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Also try getting a drop of oil underneath the armature with a needle oiler. In tough situations I use hot sauce reel oil, very creepy. Available at most sporting goods stores. Another check is take a tooth pick and insert in oil hole and see if its full of solidified grease which may require more attention. 

 

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franktrain

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Your motor looks pretty clean despite that old trick i learned long ago and some may disagree were  all different was to flush it out with lighter fluid to loosen any sticky in there.

With all these twin motor setups when applying power off track the motors should start running nearly at the same time

Once running properly they are some great pullers i can attest along with the old postwar Trainmasters  F3s and GG1s twin motors of the time.

 

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Thanks for the input and interest. After a couple hours of oiling, hand turning (started with vise grips), more oiling, even more turning. the ol gal runs. After sitting in storage for 50yrs. Next I'll replace the light bulb then start on the horn car.

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