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Subject: 641 year

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Chris    Posted 02-11-2021 at 04:01:51 [URL] [DELETE]        [Reply] [Email]  
  • 641 year
  • I recently bought a ford 641 tractor. Trying to determine year so i can order a new clutch kit for it. (Press clutch pedal in will not engage) the stampings above starter read as such
    641
    Diamond 75 930 diamond
    Any hep decoding this would be much appreciated, or tips on how to get the clutch to engage ( sat for a few years before i purchased) but is now 12v new carb and runs great other than clutch issue.
    Thank you in advance.
    https://share.icloud.com/photos/0TVYtI_v9FHqRyKNKapqpT9GQ#Cedartown

    Tim Daley(MI)    Posted 02-12-2021 at 08:18:37 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 641 year

  • All these guys have offered very good info and advice. I'll add too that I often tell fellas not to bother with an engine serial number as it only ID's the block, and parts may not be as were originally. You can make a note on the s/n but it is always best to inspect which parts you have now before buying anything. Many time guys buy overhaul kits before tearing down block only to discover later parts were changed previously and have to return and get correct ones. The diamond symbols in the s/n were changed when Ford went to cast iron cylinder liners in late 1951 on the 8N model and never went back to steel. He diamond means nothing now as all cylinder sleeves are made in cast iron.


    Tim Daley(MI)

    KCM    Posted 02-11-2021 at 12:51:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 641 year
  • All 641 tractors take the same clutch no matter the year, but it does make a difference which transmission you have (4-speed. 5-speed, 5-speed with live PTO). Most likely it is a 4-speed as that is what most of them have. As has been said, it will have the fine spline transmission input shaft if a 641. Earlier 640 models used a course spline shaft. This affects the clutch disc needed. I would split it first before ordering parts to see what is going on and what you need for sure.

    Kirk-NJ    Posted 02-11-2021 at 16:33:08 [URL] [DELETE]        [Reply] [Email]  
  • Re: 641 year
  • Not all 641 will have the same clutch. A 641 with serial number less then 14257 will have a differen.t clutch and different flywheel

    mhb@ufe    Posted 02-11-2021 at 09:21:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 641 year
  • According to your serial number it is a 1959. Pushing the clutch pedal in should disengage the clutch. Because it sat for a few years the clutch is most likely rusted to the pressure plate and or flywheel.

    Mark

    Kirk-NJ    Posted 02-11-2021 at 07:52:36 [URL] [DELETE]        [Reply] [Email]  
  • Re: 641 year
  • Your tractor will need the clutch with the fine splines. Would suggest you take it apart before ordering a new one.

    Tim Daley(MI)    Posted 02-11-2021 at 06:20:59 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 641 year
  • Many Ford Tractor clutch part are all the same from '39 - '57.

    Tim Daley(MI)

    Dead Eye Dave    Posted 02-11-2021 at 15:27:57 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 641 year
  • Do not spend a penny until you free the clutch from the pressure plate. You may have a perfectly good clutch which only needs freeing up. Check in the archives here for lots of good info on how to do that. Also, onece freed, always block the pedal down after each use.

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