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Subject: 640

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Leroy    Posted 03-04-2018 at 19:25:18 [URL] [DELETE]        [Reply] [Email]  
  • 640
  • Have recently aquired a 640 and the 3 point is jerky and slow. Manual calls for M-4864-A fluid in this system. What is that equivalant to today?

    TheOldHokie    Posted 03-05-2018 at 05:53:18 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 640
  • M4864A was a mild EP SAE 80 gear oil which Ford recommended for year round use in all three sumps of the Hundred series tractors. Because that oil was overly thick in cold weather the Ford Owner's Manuals all recommended adding a couple quarts of lower viscosity hydraulic oil (M4864D) to the contents of the hydraulic sump. As oil technology advanced Ford changed that recommendation to their newer M2C-134 oil which had a higher viscosity index and was better suited for year round use in all three sumps - no thinning needed in cold weather. The ubiquitous and inexpensive Universal Tractor Transmission Fluids (UTTF) sold today are generic equivalents for M2C-134 and the picture below is one of many brands available today. UTTF type oil has been widely and successfully used in millions of Ford Hundred series tractors for over a half century.


    Dollar Bill    Posted 03-05-2018 at 03:55:21 [URL] [DELETE]        [Reply] [Email]  
  • Re: 640
  • CNH recommends 134D or equivalent for the power steering, transmission, hydraulics and rear end. UTF meeting 134D spec are sold by NAPA, TSC and even WalMart. Some prefer EP-90 in transmission and differential. Your call.

    36 coupe    Posted 03-05-2018 at 04:24:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 640
  • My 640 did not like 134D.Loss of lift in hot weather.Put in EP 90 lift trouble went away.Ford dealer reccomended 134D He was wrong.The Ford service manual says 90 weight.Vane pump is problem when worn.

    Leroy    Posted 03-05-2018 at 15:37:08 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 640
  • Thank you all for the info.

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