TONY JACOBS said: (quoted from post at 09:33:02 05/15/13) 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
Tony,
The reason it was a mystery was because when I posted this, we had no idea that that pipe was broken. The other mystery was the bearing race pieces we found in the bottom of the case and discovered no bad bearing.
On the topic of the tube … We have heard of others using hydraulic lines to repair their supply tube. They have reported it working so far. The pipe simply cracked in half. There are no parts missing. I think we are going to braze it and put
Now the tube, I agree that the rigidity of the tube keeps the pipe pressed into its position. We have heard of others using hydraulic lines to repair their supply tube. They have reported it working so far. The pipe simply cracked in half. There are no parts missing. I think we are going to braze or weld the pipe and place rubber hose on the outside as a failsafe and shock absorber. Maybe the hose on the outside will provide dampener and reduce vibration on the tube. Sort of like how people place rubber on a compound bow to stop vibration and reduce sound. The hydraulic hose placed on the tube should provide some of those benefits.
I completely understand the spline concept. The hex idea makes since to me as well. If you had a hardened bolt and a hardened wrench with no wiggle room like some of today’s wrenches allow there would be very little chance of it stripping unless you spun it off the top of the bolt. With the way John takes these worn input shafts and converts them to hex design with tolerances so tight it has no play what so ever. So what you're telling me is if you had a 6 pt socket and a 12 pt socket and you placed them both on a bolt or shaft that had very very tight tolerances the 6 pt. would strip out first? I beg to differ. I believe they would both provide that same results and the bolt head would break off before they stripped. Generally speaking, a 6-point socket gives the user less room for error. That is to say that due to the restrictive shape of the socket's interior. On the other hand, a 12-point socket more closely resembles a circle on the interior, the same goes with a fine splined shaft. With a 6pt you have much more metal to chew through rather than the thin individual splines. That's just how I see it, and I consider myself an intelligent individual. I am currently working towards my Bachelors of Science in Engineering Technology from Purdue.
This tractor will not be a show tractor. It will be a lightly used tractor for mainly bush hogging, grading, and maintaining deer food plots. It will be used on occasion as in just weekends. This tractor will barley reach 50 hours a year, and that a high year! Anyways, I think we will be fine with Johns repair. He has done others and they all have good things to say!
This post was edited by Jchampiii at 10:49:28 05/15/13.
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