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The easiest way to gain more room is to split the machine in half.
There are normally 4 or 6 bolts that hold the front half of the machine to the rear half, 2 or 3 per side depending on manufacturer.
Remove all of these bolts except for the bottom two. Loosen those up and the machine will hinge at the bolts allowing you access to the belt area.
This pictures shows a typical setup. The machine in the picture is a little different since all the bolts will have to be removed because the flange is 90 degrees off from normal snowblowers
thanks for the answer....I will try your suggestion tomorrow and get back to you...
Thanks for the direction you sent me...the belt is replaced. The only problem was that I was not as careful as I should have been and the twp pieces separated...but I connected them and then installed the auger belt.
thanks again....very satisfied