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JD 3020 Engine swap gas to diesel?

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Craig Houle

08-15-2001 23:16:43




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I have picked up a gas 3020 tractor with a 148 loader. Runs excellent and will serve my purpose for the time being (only corral work). Does anyone know if I can swap this engine easily with a diesel in the future. If so I can start hunting for an engine and rebuild it over the next several years.




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G Taylor

08-16-2001 10:53:53




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 Re: JD 3020 Engine swap gas to diesel? in reply to Craig Houle, 08-15-2001 23:16:43  
For all this tractor will be used a diesel will never pay in reduced fuel usage. A gasoline engine can be 1/2 rebuilt for just the cost of a diesel injector & pump. A gasoline engine is better suited for putting around a part load, short duty cycle & cold weather starting. If you still want a diesel it will be cheaper, take less time & certainly less frustrating to sell the 3020 to collector & purchase a diesel.

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WTW

08-16-2001 10:51:29




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 Re: JD 3020 Engine swap gas to diesel? in reply to Craig Houle, 08-15-2001 23:16:43  
Craig, To say it was easy, one would have to know what your abilities are. Not bad for someone that is familiar with these tractors and done a few of them. Here are some facts that you need to consider. Parts needed to convert from a gas to diesel including the engine that are different and will have to be changed include: Throttle Control Linkage, Water Pump, Manifolds, Flywheel, Front Pulley, Air Cleaner, Air Intake Pipe, Fuel Transfer Pump, Muffler and possibly the Oil Pan. An engine out of another farm tractor application would be the best bet and would include most if not all these parts needed to convert. The problem is where do you find that at and why would they be junking it? The hardest thing to accomplish in doing these conversions is finding a diesel engine and If you do find one. Is it good enough to spend the money on to rebuild? These engines are real hard to find and very sought after. Luck is on your side if you find one! The last one I converted I bought out of another 3020 knowing it had a bad crank. There is no such thing as a good used 3020 diesel crankshaft so a new one was used to repair that concern along with all the other parts to major it. It was not practical to spend the money on the tractor that the owner did but It was a Power shift and the gentleman bought it new and wanted a diesel in it as he farmed with the original gas for many years and knew the difference it would make as he also had gas and diesel 4020 tractors on the farm which I have also converted. Both his conversions the 3020 and 4020 were Power shifts. If you asked him today if he would do it again I know for a fact that he would say yes. Good Luck Dave W.

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Greg H.

08-17-2001 13:16:55




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 Re: Re: JD 3020 Engine swap gas to diesel? in reply to WTW, 08-16-2001 10:51:29  
DaveW,
I haven't observed you posting for a long time, It's good to see you helping out again. You, John T, and a few others helped out alot a few years ago when I started fooling around with the New Generation tractors. Now a few tractors later, and with the help of a good service manual and some specialty tools, I feel fairly comfortable tearing into my old tractors when I have the need to. It's a good feeling, and it's been accomplished with alot of help from this board, so thanks again, and post back often on the new generation problems. By the way did John Deere use the 3020 Diesel engines in any other farm machinery, or were they just used in tractors? Just curious, anyhow take it easy, Greg H

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WTW

08-20-2001 09:41:30




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 Re: Re: Re: JD 3020 Engine swap gas to diesel? in reply to Greg H., 08-17-2001 13:16:55  
Greg, The only other application the 4 cylinder 270 cubic inch Waterloo (3020 Engine) was used that I am aware of was some power units and Industrial John Deere 500 tractors and 500B Backhoes. There was an early and late version of these engines just as they were in the 3020's and 4020's as well. The very latest version had a round hole in the side of the block to put a block heater right in the block water jacket. This engine did not have the ventilator pump as the earlier ones did same as the 4020. There were actually three different engine blocks used in both the 3020 and 4020 diesels over there production cycle but all will bolt in there respective model. Dave W

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