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Mike, it is not a hard job, but yes, you have to remove the axle housing to get to the brakes. I did it when I restored mine a few months ago. It is a one man job, but is pretty heavy to move around. You have to support the tractor rear end under three places, the axle you are not working on, the middle, and the one you are working on. Brake shoes will need to be drilled out and new ones installed with rivets. All straightforward. The only problem I had was that the new linings were too thick to fit back in the drums, probably caused by some corrosion I left on the drums. I should have turned them. When I re-installed, I broke the shoe lining and had to redo it. On the second one, I sanded the new lining down to 3/4 original size before refitting and it worked fine. Only problem was that it was probably asbestos (cancer causing in lungs) so I used a shop vac while sanding and used a respirator. Your school shop will probably not allow that activity indoors. Seals were easy to replace and without incident.
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