John Deere had a bad habit of oversizing the new generation gas engine carbs to get that last full throttle horsepower out of them to look good in the Nebraska tests and sales literature, but it made a gas engine that only ran decent at full load and full speed. Low and mid dirvability and mixture control was awfull. I fixed my gas 4020 by substituting a little 283 CID moline (model U)carb for the original JD carb. It starts and runs so much better at idle to 80% load . If it lost any top end power, it would take a dyno to tell it, as I cant feel any less power by the seat of my pants . sure makes a much nicer working tractor out of it.
Two other problems those gas tractors had since new was the pathetically weak ignition system and starter. I built a Delco MT25 starter to replace the wimpy stock 10MT starter and replaced the weak ignition resistor and point distributor with a powerfull solid state ignition system.
I now have a tractor with enough starter that it actually cranks so fast that it has to slow down to idle, it does not spit or smoke and it starts and runs in any sort of damp / wet weather. Also due to the stronger ignition system, it has not fouled a plug or needed any plugs replaced in over 10 years.
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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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1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
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