Transmission gear replacement on a JM 354 Beware of carnage!

   / Transmission gear replacement on a JM 354 Beware of carnage! #11  
Oh I am not attempting this alone, I have a REAL mechanic doing almost all of the real work. I am good for fetching parts and water and general "take this bolt out". I Started to work on it when it was a simple job, as soon as I determined just how much there was to do to pull this off, I called a professional. Even at that HE had no idea it was going to be this complicated. I also did not have a way to split the tractor and hold it up. Well, now that I know how small the pieces are when you are eventually done, I probably could have handled it with a couple wheel barrells! I also need to stay focused on work, and want this done in a reasonable time frame, so I got lots of help. If you can take the top shaft out the front, why not the bottom? I always say an engineer should have to change the oil on any car they design, I now say they should have to work on a tractor they design as well. It was like one thing led to another to another, and then there was nothing left but a pile of parts. Yep, I am sure I am still ahead on my "cheap" tractor, but the margin keeps getting closer all the time. I am wondering how many of these shifter forks have broken off, I seem to ave read of at least 2 others on here alone.

Nevertheless, you are still a brave man.
I've done a bit of work myself and know that much of it was over my head. But like you, I wanted to keep the cost of the "cheap" tractor down as much as possible. So far I think I'm still ahead by plenty.
Please continue to post as many photos and information as you can.
Greatly appreciated,
Rob-
 
   / Transmission gear replacement on a JM 354 Beware of carnage! #12  
Ordered my parts today: Half dozen gaskets, 3rd gear, 2nd & 4th, 1st & revers, driven 1st gear, driven 2nd gear, bearings, shifter fork.

Nice pix. Thx for posting. (Us "gearheads" love to see gears.)

Do the gears appear to be well-machined? What do they cost?
 
   / Transmission gear replacement on a JM 354 Beware of carnage!
  • Thread Starter
#13  
Ordered my parts on Wednesday, had em in the mail USPS on Friday. Affordable Tractor out of Texas are really great! The gears ranged in price from $41 to $65. The double ones are more I think, with 2 gears on them. Gaskets were pretty fair right around 5-6 $, with the exception of 1 that was $19 for the tranny housing.

The gears all look like "sand mold" products. You can see the pits and rough surfaces on everything except the faces of the gears. Those look like minimal machining with some polishing. I can only hope they heat treated these at least once. They are beefy, no thin gear faces under 1/2", they are making up for strength in bulk!

I had to work on my garden this weekend with a wheel barrel and 16" hand tiller. having a Broken tractor sucks! I also got a call last week to do a nice big roto-tilling job for someone. :mur: (theres no crying smily)
 

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