Walthers Mainline F40PH Problem

[tompm]

I need some help. I just purchased two Walther's Mainline Amtrak F40PH locos. The snow plows on them are catching on any joint that is not snug. If there is any gap the plow is catching on the gap. One of the plows actually broke off.  I am using Atlas code 100 track. 

I have never experienced this problem before. No other loco I have has this problem. 

Upon closer inspection it appears the plows are basically riding on top of the rails. There is no clearance between the plow and the rail tops. Has anyone else have this problem? Any suggestions?

I am trying to see if I can find any photos of the locos without the plows.