Greetings and Merry Christmas,
After sever years of inactivity, I handed down my 2025 to my grandson this year. I disassembled the engine to both clean, lube and also show my grandson the tear down, reassembly, oil and grease points. I removed the cross head and eccentric rod assembly's and then removed the motor so I could show him the gears, armature, brushes, etc. I've done this many times over the years and it's always never failed to run. Several hours later he called to say the engine had seized up. I asked if he could move the drive wheels and he said it took some gentle persuasion and eventually they freed up then locked up again shortly thereafter. I returned and the drive wheels would move about a 1/4 turn in either direction and then would bind up. Eccentrics were in correct position, smoke crank rod was not bound/pinched neither was the valve rod or crosshead and everything appeared to be normal. I disassembled it, checked, the gears, axles, armature and all seemed ok. The wheels eventually freed with some persuasion and then after running several minutes, froze up again. Also placed lock switch in both positions, no difference there.
Using the original 1033 transformer it came with and U and A connections to track as I have done in the past. When it would freeze up, motor would make loud humming noise and was at low throttle.
Any thoughts and thank you.
Russel