Just acquired a 9N

[will-max dairy]

Frustration ensued anyway. The new one won’t fit over the overrun clutch that’s on there and the machinist was acting like I was an idiot when I told him it didn’t fit.

Give yourself and the machinist a little grace. One thing that isn't often mentioned with these old N tractors... is that their PTO shaft is smaller than modern shafts. They were originally 1-1/8", six spline, shafts. Starting somewhere in the 50s or 60s, the industry started to standardize on a 1-3/8", six spline shaft.

If your overrunning clutch is like mine...it has a 1-1/8" female, to match the N tractor, and a 1-3/8" male to fit modern, standard PTO shafts.

Your machinist may have thought they were doing you a favor by using a 1-1/8" female to fit an N tractor, not knowing that your overrunning clutch adapts to the new standard.

Of course, this is all conjecture on my part. But... if you have a set of calipers, measure your overrunning clutch male end and the female of your new PTO assembly... you may find that it's just a miscommunication.

Or... if you, or a friend, have a newer farm tractor around... test fit your old mower PTO shaft on the newer tractor... and then try to test fit your new one. That may be easier than trying to figure out the difference between 1-1/8" and 1-3/8" on a six spline female coupler using calipers.

I find my own answer a little ironic, as I was commenting on another thread about how valuable I consider old N tractors to be... and they are, if they are kept in good condition... but... they have quirks that can easily cause these kinds of misunderstandings...

 

[Cavtrooper]

Give yourself and the machinist a little grace. One thing that isn't often mentioned with these old N tractors... is that their PTO shaft is smaller than modern shafts. They were originally 1-1/8", six spline, shafts. Starting somewhere in the 50s or 60s, the industry started to standardize on a 1-3/8", six spline shaft.

If your overrunning clutch is like mine...it has a 1-1/8" female, to match the N tractor, and a 1-3/8" male to fit modern, standard PTO shafts.

Your machinist may have thought they were doing you a favor by using a 1-1/8" female to fit an N tractor, not knowing that your overrunning clutch adapts to the new standard.

Of course, this is all conjecture on my part. But... if you have a set of calipers, measure your overrunning clutch male end and the female of your new PTO assembly... you may find that it's just a miscommunication.

Or... if you, or a friend, have a newer farm tractor around... test fit your old mower PTO shaft on the newer tractor... and then try to test fit your new one. That may be easier than trying to figure out the difference between 1-1/8" and 1-3/8" on a six spline female coupler using calipers.

I find my own answer a little ironic, as I was commenting on another thread about how valuable I consider old N tractors to be... and they are, if they are kept in good condition... but... they have quirks that can easily cause these kinds of misunderstandings...

100% what it was. Thank you for this post brother. I appreciate your knowledge and your willingness to share it.

 

[Jim in LA]

Your brush cutter looks just like mine, it is a Big Bee and is a pasture cutter not meant for heavy brush. Mine mows as good a finishing mower. Yours is probably a lot older than mine and is built of thicker material. Don't forget to check on YouTube for procedures involving your 9N. I'm putting the engine back on my '51 8N this weekend. Hope to have it running before Thanksgiving. Have fun!

 

[Jim in LA]

Agri Supply has a good selection of PTO shaft assemblies and reasonable prices. I have bought series 4 shaft assemblies from them for my 5 ft. tiller. If you get a new shaft, you will more than likely need to shorten it some. There are videos on YouTube that show you how to do it. The new shaft may include instructions.

 

[Cavtrooper]

Agri Supply has a good selection of PTO shaft assemblies and reasonable prices. I have bought series 4 shaft assemblies from them for my 5 ft. tiller. If you get a new shaft, you will more than likely need to shorten it some. There are videos on YouTube that show you how to do it. The new shaft may include instructions.

Yessir 100% not made for heavy brush, and also mine is a 2N. I thought it was a 9N but found out it’s a 2. The 2 acre pasture at this new house hasn’t been mowed in probably over a year. I’m having to take 1/4 bites on each pass and it’s still bogs down a bit. Once I get it mowed though it’ll be nice and easy. I dont like to let stuff like that go unless I have no choice. Being retired army unmowed grass is a pet peeve of mine when one has the resources to mow it

Also I did get a series 4. Had a little bit of problems with the slip ring, and the machine shop did cut it a bit, but I’m in business now.

 

[Cavtrooper]

Had a lot of metal rattling sound when I turned the starter today. I have a feeling something broke inside the engine. was hoping to make it through the spring before I tore into the engine and also rebuilt the hydraulic pump, but it looks like I'm going to have to do it a lot sooner than I was ready for.

 

[John Deere D]

Had a lot of metal rattling sound when I turned the starter today. I have a feeling something broke inside the engine. was hoping to make it through the spring before I tore into the engine and also rebuilt the hydraulic pump, but it looks like I'm going to have to do it a lot sooner than I was ready for.

Remove the Starter..........
Inspect Starer drive.....
Inspect Flywheel RING GEAR....

 

[Cavtrooper]

I'll definitely do that. Thank you.