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Ford Tractors Discussion Board

Re: Ford 901 Select O Speed Mystery


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Posted by TONY JACOBS on May 15, 2013 at 09:33:02 from (172.162.67.210):

In Reply to: Ford 901 Select O Speed Mystery posted by Jchampiii on May 13, 2013 at 07:57:53:

Hello James , Not much of a mystery with the pressure tube breaking on a Diesel equipped S.O.S. tractor it is very common in fact . Harmonic vibration from the diesel engine causes the cracks even in the sheet metal . Best bet is to get a used one from a gas engine tractor . Your patch job with hose will not last long or may not even work . Ford made the pipe rigid for a reason , so the o-rings will seal . They are not designed to wobble loosely which is what they will do will with a flexible connection under pressure . It is pretty hard to re-engineer factory parts unless you have engineering experience or severe off road or racing experience which can break anything revealing the weak points . Since you do not understand what a spline surface does or you did not say that you do and hopefully you will only be using your tractor as a show tractor because the whole purpose behind the fine spline input shaft is WEAR SURFACE on each of the splines which is a lot more than a hex shaft will ever be , just like stripping a 6 POINT BOLT HEAD with a 6 POINT SOCKET because you only have 6 DRIVING POINTS . It is the reason why Ford changed over to FINE SPLINE INPUT and OUTPUT SHAFTS on the TRANS. the PINION GEAR and the AXLE SHAFTS between the 600/800 series tractors and the 601/801 series tractors in 1958 . It took THOUSANDS OF HOURS to wear off all of those splines on that HARDENED INPUT SHAFT a hex will wear faster regardless of how hard it is . It is the same reason why AIRCRAFT use 12 POINT NUTS and BOLTS rather than 6 POINT NUTS and BOLTS they have more surface area so they can be tighten properly without stripping the head or nut surface . Thanks Tony


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