At a swap meet this past weekend I purchased a Bachmann 2-12-4. It tested okay on the straight test track, but when I ran it on my home layout the rear 2 drive wheels fell out of the axle shaft.  I was unable to press them in tight enough to make them stay.  When I checked Bachmann parts, they (of course) don't sell the 2-12-4 anymore.  The iso diagram that is linked is for a 2-10-4.  Will the wheel sets shown in the 2-10-4 diagram replace those on the 2-12-4 I have?