It gets even better. I dropped a bolt on the deck, and I could not find it with a magnetic tool, my hands, or the leaf blower. I had to remove the deck to find it. When the deck came out, a big black object was lying on top of it. Turned out it was the muffler.
There was no clamp. I can't figure out what had been holding it on. I couldn't jam it back in place. I have no idea how it was originally shoved in that space. I think I may have been trying to shove it in backward. My hands were filthy, and I was getting ready to quit, so I didn't check the parts site while trying to orient it in the tractor. It's standing on the floor in my workshop.
The muffler has what looks like the remains of two broken mounts on it, but I didn't find anything inside the tractor that corresponds to them. It's like it came from a totally different tractor. I must have looked in the wrong place. There is also a rectangular hole in the muffler, and it looks like someone made it with a Dremel. It's maybe 2.5" x .75". Why on earth would you cut a hole in a tractor muffler? Why not save time and remove the muffler entirely?
The places that looked broken looked like they had been that way for years.
I checked the web for new mufflers, mainly to find out how they were mounted. They don't look quite like my failed muffler.
I ran the tractor with no muffler to get it indoors. It sounds exactly the same way it always has. Either the muffler has been hanging loose for a long time, or that crazy hole makes it sound like a straight pipe.
I have to figure out what to do now. The factory muffler costs $256, and people on the web don't seem impressed by it. Apparently, muffler failures are a weak point with this tractor. I would rather put something on there that won't break.
I've always worn hearing protection when using this tractor. I figured it was loud because that's how they made them in '92. Looks like I was listening to exhaust straight from the engine.
I have read that the lack of back pressure will not hurt this engine, so I guess I have all the time in the world to come up with a solution.
Taking the deck off is a major chore. Deere made it so it doesn't clear the frame unless you jack the tractor up or take a wheel off the deck. The interference is less than half an inch. You would think a trained engineer could have made a tiny adjustment and saved consumers a lot of grief. Of course, John Deere's engineers were not smart enough to specify a linked belt for this tractor, and random Internet people were, so I should not be shocked. They didn't provide any way for rain to drain off the deck, either.
While the deck was off, I took the opportunity to grind metal off the deck's pivot shaft. The flanges were made incorrectly, so there is tremendous friction between them and the tractor frame. The first time I took the deck off, I nearly had to use a breaker bar. Today I took a brutal Walter flap wheel to it. I hate to beat up a part like that, but this thing is a piece of junk, and I'm afraid that if I replace it, the new pivot shaft will be just as poorly made. For all I know, the tractor frame itself could be the problem, so if I buy a new shaft, and the new shaft was made correctly, it might not help.
Obviously, someone at Deere and also the dealership let this deck go through, knowing it was screwed up. Someone had to install it, and when they did, they had to apply a great deal of force. They just kicked it down the road to the guy I bought it from, and now it's my problem. Nice quality control.
I'll keep grinding steel away until I get an acceptable fit. Maybe I can go teach a class for John Deere's engineers.
I'm afraid to take this thing to the local dealer. My understanding is that they maintained it before I got it, and there are bubba tracks all over it. I assume they cut the mystery hole in the muffler. Still trying to figure out why someone beat on the inner PTO shaft and left dings on it, making it harder to slide in and out. Maybe someone at the dealership used it as a hammer.
If I seem crabby, try to imagine the experience I just had. It was 96 here today with about 200% humidity, and it took me over a day to replace a simple v-belt when I needed to be doing other things. I really hate bad engineering.