@Tommy_F posted:One issue with MPC locomotives is that they do tend to be a little stiff when first put on the track. I’m not sure what it is, but the tolerances seem a smidge too tight in the drive trains (also sitting on a box for 30 years doesn’t help). The big steam engines are particularly susceptible to this, and they tend to be noisy at first. After breaking in they run fine.
This is a very well-known characteristic of the Lionel AC Pullmor motors, including those made in the Postwar period. The longer these engines are run, the smoother they get. Pullmors always need a certain break-in period. Well run Pullmor motors can run like sewing machines (well, figuratively).
