You OUGHT to know, since you had one... that 540 on a 4 cylinder Ford chassis is found at 1900. 1000 is found at 2060. Some of the 3 cylinder chassis tractors achieve speed as low as 1650 with most at 1750 or 1800. The Deere in question, IIRC, achieve both 540 and 1000 at somewhere around 2500, hence there is no ability to throttle back and maintain speed. The Ford's also do not make rated power at rated PTO speed. They only make rated power at 2100 or whatever governed speed happens to be on a particular model. My point to you is and has always been that when you throttle the Ford back to PTO speed, in it's economical range, it will not burn near the fuel it would use if it ran at 2100. It was one of those nifty common sense design things they did in realising that an 86 hp tractor didn't need to drive full power through a 540 shaft... so the gear sets for 540 and 1000 reflected two different engine speeds. If you take that Ford and put it on a chopper or something that requires all it's got... it's going to make the chopper howl at about 1150 at high idle... which I don't see as being a particularly big deal. At that speed, no, it's not as economical as the Deere. The difference would seem to be that the Ford's cam profile encourages breathing and torque at mid speed. The Saran engine makes torque at higher speeds and has better efficiency at higher speeds because that's how it's designed. That's just a questionable design criteria for a utility type tractor... not that they're a bad tractor in other respects. Quite a good one actually.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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