Ted Sowirka posted:I've had similar problems with these 4-4-2s. Personally I think the wiring Lionel MPC used in the motor/chassis is underspec'd for the amount of current they can pull. Note the MPC 4-wheel motor has a larger armature and more laminations than its postwar counterpart. Plus these are carrying the heavy 2037 style cab, but have the taller gearing of a 2034. When you pull a heavy load the rubber tires prevent the wheels from slipping and things can get HOT. This is even more true the chopped-wave power supplies common today.
The advice I got here on the Forum is what Jim told you-- replace the brush springs. I bought new ones, but never got around to installing them
. Let us know how you make out.
No go on the increase of the speed. Brushes are fine. Springs are adjusted. I have noticed for the second time the pick ups are heavily pitting and the frame that holds the horse shoe field is getting hot next to the pick ups. Also noticed that the pick ups are sparking pretty bad. Sounds like what I would maybe call feed back.
Any info guys?
