Interesting pic

Could have been for use as a bush block. If you're running a cable hauler, you can use a crawler as a mobile bush block to run your tail rope through. That blade could have been used as a stop to prevent the crawler being dragged backwards. A guy I used to cart logs from just used a D9 : )
Cheers,
Neil.

Isn't that what is known as a "cowdozer" ?

Before I even opened the photo, I guessed it was at Camp 18. Been there several times. Very interesting. I don't know the answer to your question, and enjoy reading the explanations. GWH

Is it so the operator could see the cutting edge better for grading? Just a thought

Its a "cowdozer" as shown in the book "Endless Tracks"
Guys were used to using the back end of the tractor. Eventually they figured out how to put it on the front and be more productive.

Thanks guys. There was another explanation over on the ACME board to do with pushing dirt backwards and using a higher gear to go forward to get another load. I'll have to borrow the "Endless Tracks" book again. .Bill and I both missed that "cowdozer" part in the book. .or couldn't remember it. that😆 CRS disease must have hit both of us at the same time

Were they known as "cowdozers" before or after the term "bulldozer" came into use?
Cheers,
Neil.