N Board Forum - Expanded Thread Page

Subject: 9N pto cap

[Back] [Return to Top of Forum]

Andy Wildman    Posted 09-14-2017 at 11:16:54 [URL] [DELETE]        [Reply] [Email]  
  • 9N pto cap
  • I am curious about correctness of an aluminum PTO cap for my 9N, any N for that matter. I have serial number 9N4670. I searched the archives but found little discussion about PTO caps. A lot of talk about the threads on the cap but little else. Parts book list the part number 9N-726 with little information. Just looking for info. Thanks in advance.

    Tim Daley(MI)    Posted 09-16-2017 at 05:37:30 [URL] [DELETE]        [Reply] [No Email]  
  • Here are the two FORD N-SERIES TRACTOR PTO CAPS:

    NOTE: The 9N-726 cap is cast iron; the 2N-726 cap is stamped steel. Both have identical Thread Size of 2-5/8"-12 UN 2A.

    Tim Daley(MI)

    Kirk-NJ    Posted 09-15-2017 at 04:59:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9N pto cap
  • I have always thought that the very early ones were cast aluminum and than changed to the cast iron. There would be no reason to change the 9n-726 part number because they were basically the same only a different material. My '39 9n #7863 had the cast one as did my 1940 9n bought from original owner.
    Over the years I have never seen an cast aluminum one on a 9n and I have looked. As others have said get the cast iron one and paint it and no one will be the wiser.


    Tim Daley(MI)    Posted 09-15-2017 at 06:45:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9N pto cap
  • Kirk-
    Well, yes, any time a part was changed, even for a minor thing like the material spec, the basic part number would reflect with a suffix or prefix like "A" or "B" or "C" or "D" when the revision was made and effective. For example, the early 9N's offered an optional plastic seat made from soybean polymers. P/N 9N-400-A, (steel), and 9N-400-B (plastic) are both listed in the March 15, 1940 MPC. Other examples are the generator pulleys, generators, and hoods. When the aluminum hood was changed to steel, the part number indicated this with the letter suffix. P/n 9N-16612-A was the aluminum hood using the snap-in battery cover. The 9N-16612-B was the steel hood with snap-in battery cover. The 9N-16612-C was the steel hood with the hinged battery cover. There has to be a documented system of part identification. I see no reference made to the aluminum early PTO-cover in MPC's nor John Smith's site. I would go out on a limb now and a say they were strictly aftermarket, probably offered when the 2N-726 cap was released for early 9N owners. I am not the expert though, maybe Barkley or Smith can chime in.

    Tim Daley(MI)

    Tim Daley(MI)    Posted 09-14-2017 at 14:24:13 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9N pto cap
  • The original 9N-726 PTO Cover was cast iron and was never aluminum according to all the MPC's. In the picture, the second one from the left is the correct 9N-726 cast iron PTO Cover. The 2N-726 PTO Cap was released and used up thru the 8N models. One of the many fallacies in the Peterson/Beemer books on Ford Tractors and Implements is this caption.


    Andy Wildman    Posted 09-14-2017 at 14:43:08 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9N pto cap
  • So the aluminum one on the left (in your picture) is a aftermarket\replacement? An early original would be that shape, but cast iron. Like the second one on the left.

    All good info.

    Tim Daley(MI)    Posted 09-14-2017 at 17:21:39 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9N pto cap
  • By what I am reading in the MPC's the 9N-726 cast iron cap was used until they changed it to the 2N/8N style. I don't find anything about the aluminum cap molded from the 9N cap so I can only assume it is aftermarket, but I may have missed something. Have not looked at John Smith's site to see if he writes about it or not. Jason Grooms would know so I'll give him a holler too. FORD would not have released an aluminum cap in the war years, that much is certain. I don't see the 2N-726 listed until the January 1946 MPC, but then there were no 43, 44, or 45 MPC's. I'm sure the aluminum works fine and once painted, no one is going to know anyway.

    Tim Daley(MI)

    Farmer Dan    Posted 09-14-2017 at 11:32:03 [URL] [DELETE]        [Reply] [Email]  
  • 49068
  • I believe the early ones were cast iron. Then Stamped/formed steel then Tisco came along and made aluminum ones. I could be wrong though.

    Farmer Dan

    1940 Ford 9N "Maude"
    1972 Moto Guzzi Eldorado
    2012 Ford F150XLT, 4x4,Super Cab

    Andy Wildman    Posted 09-14-2017 at 12:51:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: 49068
  • I was thinking more of a cap like this.

    [Back] [Return to Top of Forum]