I like gasoline tractors and pickups, but I doubt there would be much demand for brand new tractors with simple carburetor fuel systems and distributor ignition systems. Even if those older engine designs were still available, the reliability would be as poor as they were fifty years ago and the availability of low cost used machines would undercut sales. Modern fuel injection, computer controlled ignition and electronic controls would be necessary for fuel economy, reliability and to meet emissions requirements.
Are there any modern 40 HP industrial gasoline engines available today that could be installed in a small 35 PTO HP tractor and give 10.000 to 15,000 hours of reliable service? If not, the tractor manufacturer might have to convert an existing non-turbocharged diesel engine to burn gasoline or maybe multiple-fuels. That might require development of: new cylinder head; new pistons; new camshaft; a computer controlled ignition system; an electronic fuel injection system; and maybe variable cam timing; emissions certification; etc.. Without high volume sales at the start, a gasoline tractor might cost as much or more than a comparable diesel model. Would US buyers pay a premium for gasoline tractors with lower fuel economy than the comparable diesel model?
Fuel prices in most countries are much higher than in the USA. Fuel efficiency of modern gasoline engines has improved, but they still do not rival the efficiency of Tier 4 diesel engines. If a modern 35 HP gasoline tractor would sell well in the US, would it sell well anywhere outside the USA?
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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