A lot of the early tractors were made to run on tractor fuel, a very heavy fuel which was somewhere between diesel and kerosene. It was what was left over after cracking the gasoline. The tractors were started on gasoline and when they reached operating temperature, (around 190-200 degrees) they were switched over to the tractor fuel. This heavy fuel would pre-ignite and cause the engine to knock and all kinds of bad things would happen. In order to combat this, the manufacturers implemented a water injection system. You kept turning the water up until the pre-ignition quit. In the John Deere's, the water came from the cooling system, so no antifreeze and you had to be sure and keep the cooling system full. The old Oil Pulls had a separate water tank partly because they were oil cooled. As I understand, when the Oil Pulls got up to operating temp and were worked hard that they would use more water than they would fuel. Many of you have probably gotten the email about the car that runs on water. Nothing new, they were doing this at the turn of the last century.
As gasoline became more plentiful and cheaper, most tractors were gas only and the need for the water injector was no longer needed.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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