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There are places on this site where you can order a manual. The I&T manuals are pretty good and I used that when I did the brakes on our MH50 about 15 years ago. They still work. Basically it's a two shoe arrangement actuated by an S cam as I recall. Pretty straightforward. As one of the books should tell, the shoes can be retracted by turning a star wheel through a slot on each backing plate, like on older cars or trucks. I used a rented cherry picker to remove the tires from the axle. After you somehow get the rear wheel off safely and the tractor supported safely, the brake drum should come off after you remove two retaining screws. Why they needed to put bolts there is beyond me but apparently they thought they needed them. The brake shoe arrangement is pretty straightforward. I took the worn shoes to a brake and clutch rebuilder and had them relined. The rest of the parts were acceptable. Stuck her back together, adjusted the brakes out per the manual and she's still good. I got somebody to help me stick those tires back on, even with a cherry picker, because they had fluid in them and probably went 700 lb or so. Good luck.
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