Not to dig up the past, but I was shouldering a new pave job. There was a long wait for trucks between rounds, so I did the unthinkable, I read the operators manual. It spoke of the blade being built for pushing, not pulling, and that it was ok to move small amounts of lose material, but if it was necessary, the blade is designed to grade in reverse if swung 180 degrees before doing so. Now I have always known it could be positioned that way, but have never really considered using it this configuration. I have, on many occasions, pulled a bit of material back to get rid of it, bot for the small amount of material that I am trying to lose, it wouldn't be worth the time. But the book for Volvo says it's not recomended, but it is doable.