Sears lawn tractor brakes
I have an old (1980) sears 12 hp lawn tractor at my summer home that lost its brakes all of a sudden. I do not have the model number or anything but it is the old style gray sears tractor that you see all the time. It has a 4 speed manual tranny. When you push in the brake/clutch, it does not stop the tractor. It shifts fine so it doesn't seem like the clutch is affected. Like I said it happened all of a sudden one day. Can anyone clue me in a bit on how the brakes on these old tractors work and maybe what to look for? I do not have access to it except on weekends. I am not a mechanic but I can generally understand enough to get by. If there is a link to a manual or something that would be great.
Thanks