After sitting that long I would take the shell off and grease/oil everything. Pullmor motor comes out and is disassembled and all thrust bearings are greased. End of the motor shaft in the brush plate is oiled. Remove cover from the worm gear and grease. All axles oiled. All side rods and linkages oiled. Put it back together and test run. If you are comfortable working on trains or have some mechanical aptitude it's a very easy process.
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