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Subject: 49 8N PTO oil seal replacement

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Kimberly    Posted 04-05-2020 at 08:59:32 [URL] [DELETE]        [Reply] [Email]  
  • 49 8N PTO oil seal replacement
  • I got a new seal for the PTO shaft and have looked at the manual but still unsure of the procedure. I read that there is a shrink on sleeve that has to be cut off before I can remove the shaft cover or did I misread? What is the procedure for replacing the oil seal on the PTO shaft?

    Tim Daley(MI)    Posted 04-05-2020 at 12:13:30 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 49 8N PTO oil seal replacement
  • Kim-
    In your Clymer/I&T FO-4 Manual is a procedure to R&R the PTO shaft –see here. It’s a good idea to always make a sketch and/or take pictures when doing a project so you have a record of how it was disassembled. It can be useful when re-assembling the part.


    FORD N-SERIES PTO INFO – I&T/CLYMER FO-4 MANUAL:



    Tim Daley(MI)

    Tom    Posted 04-05-2020 at 09:38:04 [URL] [DELETE]        [Reply] [Email]  
  • Re: 49 8N PTO oil seal replacement
  • Its been a long time, but I think you only need to remove the collar if you want to replace the bearing or if the collar has a groove worn in it, which is often the case. After draining some of the differential oil and removing the 4 bolts from the PTO housing you should be able to pull out the shaft and PTO housing. By removing the retaining ring, the shaft and bearing should come out of the housing. The seal should be in the housing and you should be able to use a hammer and punch to drive it out. If you do need to remove the collar, by having the shaft so there is a support under the collar, use a cold chisel as if you are trying to cut a groove along the length of the collar. This should swell the collar so it can be removed. The new collar must be heated with a torch, not quite to being red, so it can be installed. Before installing, check the outside diameter of the new collar to see if it is the same as the old one. This is true of the seal inside diameter also.

    Tom    Posted 04-05-2020 at 10:00:36 [URL] [DELETE]        [Reply] [Email]  
  • Re: 49 8N PTO oil seal replacement
  • I should add that my comment applies to an original 8N shaft. Mine had apparently been replaced with a Ferguson shaft which uses a different diameter collar and seal. There are also aftermarket 1 3/8" diameter spline shafts which are different.

    Kimberly    Posted 04-05-2020 at 18:51:36 [URL] [DELETE]        [Reply] [Email]  
  • Re: 49 8N PTO oil seal replacement
  • Yes, this was very easy to do. Just remove the snap ring, tap the shaft out of the collar, tap out the old seal, tap in the new seal, tap the shaft back in place, put snap ring back in place. The repair manual wasn't very clear at all.

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