I'm the new caretaker of an MTH RailKing Doodlebug 30-2158-1.
This twin motored car might have been test run once in16 years, but this "bug" is like new.
With a freshly charged 8.4 volt battery, it fired right up. After re-reading the startup insturctions, it took off running like it was built to do, it runs nice and smooth just like a new old "bug" should.
Right now the diaphram on the Bug sits over the rear knuckle. When going around 072 curves it causes the trailer car to derail. In reverse it's even worse. When operational, it will be navigating 031 curves on a special public display layout.
I've tried a K Line 18" heavyweight, an MTH 18" streamliner coach with the same results. The diaphragms fight each other.
My question is, what has been done over the years to make the diaphrams work as they should?