Looks like the idlers are not shimmed right, they are pushing the rail out. Check the front roller flanges to see if there is more wear on the outer flange than the inner.
Looks like the idlers are not shimmed right, they are pushing the rail out. Check the front roller flanges to see if there is more wear on the outer flange than the inner.
I just moved the shims on the front idlers the day that I took these photos.