I have a PW steam engine, a 2-4-2. Runs great for about 15 to 20 minutes and then it starts to slow down to where I need to bump up the voltage. Eventually it basically stops - OK, it'll move with FULL voltage but you would think it's a legacy engine running at 1 SMPH!
It's properly lubed and I cleaned the armature and brush contacts. I also cleaned the interior of the brush "holder shaft" (?) and dropped some oil on the rotating piece that goes thru the center of the motor.
Any suggestions?
thanks - walt