While "indestructible sprocket" and "self balancing suspension rods" don't mean much to me, I get the sense this Liebherr LR 634 loader model by LimitlessBricks is pretty darn realistic. And it's in 1:13 scale. Also: those are a lot of trans-light-blue plates.
There are loads more images in this Flickr album, including some shots that show the building process- great if you want to build something like this yourself. You can also visit the builder's website, limitlessbricks.com.