Last year I took my Hallmark 4500 in and had it worked on, Lubed, Tuned and everything, I let it set on a piece of track while I have been working on the layout. Last night after I tested the track through my tunnel on an incline with another steamer, I decided to run the 4500 up the incline and through the tunnel to see how it would do, and it is making a loud grinding whirring sound. I figure it needs a good lube again, but could something else be wrong? Thanks In Advance! P.S. The layout is coming alive guys, and I will be posting some pics very soon!