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Tractor Talk Discussion Forum

JD 4020 engine swap??What works??

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Kurt K.

05-27-2006 16:51:24




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I have a older 4020 that is really going down hill fast. It is a factory gas engine in it. I am looking at putting a deisel enigine in it though. A 6600 or 6620 engine should fit in it right? How about a engine out of a 7700 0r 7720 combine? What would I have to swap in it? How many cubes would one of these engines have? Does anybody know where I could get a cheaper engine that will work in there? Thanks for all of your help in advance!!!!

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nd-jdguy

03-27-2007 18:55:15




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 Re: JD 4020 engine swap??What works?? in reply to Kurt K., 05-27-2006 16:51:24  
I have a 7700 combine engine that I am considering to try to install in my 4020 which already has a diesel in it but started knocking.
The combine engine tag reads 6404 DH-04. The injector pump is near the front of the engine whereas my 4020 injector pump is near the rear.
Will this engine work in my 4020 and if so what major modifications are necessary?



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jon Hagen

05-28-2006 20:06:37




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 Re: JD 4020 engine swap??What works?? in reply to Kurt K., 05-27-2006 16:51:24  
I replaced the cracked gas engine in my 64 4020 with another gas engine(341 CI) out of a 105 combine. I used the combine oil pan,just added a 90 street elbow to get the oil to drain down.The combine spin on oil filter is a nice feature. I had to add intake and exhaust manifold from the tractor engine,plus crank pulley to get the hyd pump drive,and water pump and governor housing to get the right throttle linkage. I bought the like new running 2500 hr engine for $400 off a rusted out 105 combine.
With a combine diesel,you need to watch that you get a late one with a Deere engine,and you will have to supply the tractor only diesel engine parts,the gas engine stuff will not work. Others that have done this swap tell me the 404 diesel is a bolt in,while the 466 is longer and needs hood and frame extension to work. The same guys said the extra work to fit a 466 was not worth it,as the engine overpowered the 4020.

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massey333

05-28-2006 07:05:18




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 Re: JD 4020 engine swap??What works?? in reply to Kurt K., 05-27-2006 16:51:24  
Be careful, because the combines you named could have 4 different sized engines,depending on the year of mfg.The 404 is the only one that will work without MAJOR MAJOR work.You should think long and hard about rebuilding your present engine,because most combine engines are going to be in as bad or worst shape than what you now have.



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massey333

05-28-2006 15:55:09




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 Re: JD 4020 engine swap??What works?? in reply to massey333, 05-28-2006 07:05:18  
Sorry about saying,look about fixing your engine,i forgot the GAS PART,I never had seen a 4010,3020,4020 Gas until the last 4 or 5 yrs.when They started showing up in consignment auctions. Other than Olivers and 1100 Masseys nothing was sold over 80HP in Gas anywhere around us from the early 60s on.



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edchainsaw

05-27-2006 20:46:51




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 Re: JD 4020 engine swap??What works?? in reply to Kurt K., 05-27-2006 16:51:24  
my cuz TRIED to put a 7700 engine in my grandfathers 4020.

there was a lot of problems mating it to the 4020.

and the exhaust is in a differnt location.

He got it in (he is a blacksmith of sorts)



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buickanddeere

05-27-2006 17:29:14




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 Re: JD 4020 engine swap??What works?? in reply to Kurt K., 05-27-2006 16:51:24  
Take your chances with a used engine plus some tinering is required. Before you lay out any money at least price an improved 2006 4020 at the Deere dealership. Model 6603.



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davpal

05-28-2006 22:42:19




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 Re: JD 4020 engine swap??What works?? in reply to buickanddeere, 05-27-2006 17:29:14  
That helped a lot. $700 dollar a month tractor payment for five years to replace his 4020. Or get a rebuilt motor for $2500 that will probably last 30 years. That 6603 will lose more value in the first year he owns it than the 4020 ever will for the rest of its existance. And like TX Jim said the electronics and powershift transmissions will probably not be doing too good in 40 years and the 4020 will still be going strong and still be bringing $6000-$10000 dollars at auction. Kurt, buy a good rebuilt 4020 motor and put it in. The swaps are miserable jobs that lead to a lot of cobbling. Find a nice long block and drop it in and you will be off and running for a long, long time. That 4020 is a great tractor that will give you a lifetime of enjoyable use. Later.

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Tx Jim

05-28-2006 12:43:47




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 4020 vs 6630?????? in reply to buickanddeere, 05-27-2006 17:29:14  
buickanddeere,do you really believe that a brand new JD 6630 with all the elecrical gagitry will still be running in 40(FORTY)years????? ??? I DON"T!!!!! Tx Jim



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buickanddeere

05-29-2006 18:00:19




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 Re: 4020 vs 6630?????? in reply to Tx Jim, 05-28-2006 12:43:47  
Many of you guys seem to be totally terrified around electrics and electronics. And unaware that a 6603 is the striped down farmer simple model. It certainly isn't any more complicated than a 4020. The 6000 15's and 6000 20's do have more electronics than a 6000 3. Try to understand they are all together different models. The 6603 will on fuel savings it's self pay for it's self over a 4020 long before the next couple of decades. There won't be the constant nagging fix it jobs caused by time,weather,usage and abuse a 40 year old tractor has. The more things change the more they stay the same.In another 20 years most buyers who didn't grow up around 4020's and have an emotional attachment. They will view the 4020 as quaint old junk like the two cylinders and look the other way. Then they will go looking for a good reliable classic like a 6000 ten and such models.

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Tx Jim

05-30-2006 04:47:12




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 And my question was what in reply to buickanddeere, 05-29-2006 18:00:19  
YOU STILL DIDN'T ANSWER MY QUESTION!!!!! !!!!! !!! I like the JD 30,40,50 & 55 series better than 4020's Tx Jim



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massey333

05-28-2006 06:55:10




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 Re: JD 4020 engine swap??What works?? in reply to buickanddeere, 05-27-2006 17:29:14  
Do you have one to sell or what,4020 $10,000 + -,6603 $45,000 +,Big money spread, Hyd.not compatable with any other JD tractors,Wt. difference.I was a little dumb on them before but after asking two Dealers what the 6603 was exactly,they said WON'T try to sell,one dealer sold two and took them both back in within 6 months,one was wholesaled out to a jockey and the other has been setting on their lot for OVER A YEAR NOW.Deere says in their literature it is a mowing,baling,loader UTILTY TRACTOR.

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Bill(Wis)

05-28-2006 11:14:59




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 Re: JD 4020 engine swap??What works?? in reply to massey333, 05-28-2006 06:55:10  
A 6603 that would compare with a 4020 would not cost $45000. With discounts Deere is offering you should be able to buy a 6603 with cab, MFWD and all the options for $45000. One comparable to a 4020 with 2WD, open station, no stereo radio, etc., can be had new for $31000 +/-. That would be my choice over a used 4020.



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massey333

05-28-2006 15:42:50




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 Re: JD 4020 engine swap??What works?? in reply to Bill(Wis), 05-28-2006 11:14:59  
Yes I was wrong on the money,6603 2WD,open stat.list for $37904 bare(no options).Yes the 4020's are way over priced for their age,but a good one will still out work a 2WD 6603,plus it will have the capablility to match up with any JD or any Closed Center HYD.tractor.For my money a 6620 would be worth the extra money.Some Deere Dealers are not wanting to sell them(6603) for some Reason.But if that is what a person wants,then thats what they should buy.

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buickanddeere

05-29-2006 18:09:05




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 Re: JD 4020 engine swap??What works?? in reply to massey333, 05-28-2006 15:42:50  
Dealers don't want to promote or sell 60003 or 5003 models for a rea$on. The commission on a cheaper basic stripped down 3 series is pretty skinny compared to selling a 6000 20. How can a 95 HP tractor outwork a 95HP tractor? Now add M4WD to the 6603 and it will kick a 4020's butt all over the field and with less soil compaction. Open center hydraulics are no puzzel. Some other manufactures and industrial applications have always used. A hydraulic ram or hydraulic motor knows no difference from open or closed systems. Deere used open center systems through the two cylinder and on some 10 series. I don't hear complants about them.

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Jrry

01-17-2008 10:03:32




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 Re: 12 Volt Electrical question in reply to Jrry, 01-17-2008 06:03:51  
thanks Allan. I've never put a line there but always seemed to work fine starting without it. Maybe I'll try it to see what I'm missing.



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Joe in MN.

01-17-2008 09:35:07




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 Re: O/T What would you farm on 25 acres? in reply to JBMac, 01-17-2008 07:59:21  
You could try growing Poppies --- I hear they have that going on in Afghan Countries -- and do very well at it --- also Marijuana is a high cash crop --- but I think the law don't like that growing for some odd reason --- Good luck in your adventure ....



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buickanddeere

06-01-2006 03:59:39




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  checked back to this old post, suprised it's stil in reply to Tx Jim, 05-31-2006 04:31:07  
I believe there will be at least a high a percent of of 03 series tractors operating in 40 years. As there are 40 a % of 40 year old 4020's out there runing now. A salemean would prefer the commission from a $100,000 sale than a $40,000 sale. There are still a few people out there who believe the Model T, Model A, 57 Chev, 69 GTO or a 87 Grand National is the best vehicle ever built. It's just that they have an emotional attachment to that vehicle. It was either Grandpa's, Dad's or your own during thier long ago youth. Restoration of 20 to 50 year old equipment/vehicles is a thriving business as 35 to 65 year old men in thier prime earning years try to buy back thier youth. Have a look at a 6603, they are not fancy. " Fancy New", that is old coot talk. Yes I know it stressful and risky to have anything to do with anything except you already have an know. It took years for some people to accept the telephone, electricity, indoor plumbing, automobiles, microwave ovens etc. It's human nature to fear the unknown.

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Tx Jim

06-01-2006 04:28:42




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 Who says 40% of 4020's are still running? in reply to buickanddeere, 06-01-2006 03:59:39  
buickanddear,it's not hard to tell this thread is still going if you check your email! What poll did you read that said "only 40% of 4020's" are still running? How did the commission thingy jump from "$40,000 to $100,000"???? Are you trying to say one of your precious replacements for a 4020 suchas a the 6603 cost $100,000? It's ok to call me an old coot, you can even call me a redneck country old coot. I've driven,sold and worked on JD equipment for 50 years but I don't like the newer JD tractors after the 55 series. I have put 7000 hrs on my 4255 baling hay since 1993 so I think I have some first hand knowledge of JD tractors and equipment,do you????? ????? Tx Jim

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buickanddeere

06-01-2006 18:48:42




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 Re: Who says 40% of 4020's are still running? in reply to Tx Jim, 06-01-2006 04:28:42  
I picked a number to make an example. it happened to be 40%. A salesman & dealership pockets less $$$ when selling a new $40,000 tractor v.s selling a new $100,000 tractor. A 6603 is not precious. It's just a very plain simple mechanical everything, no frills tractor. It's specs are closer to a 4020's than to a 6000 twenty tractor when compared. I'm well on my way to being an old coot too. Even though my GN was the latest,greatest and fastest from 1986 to 1990. It's engine is now pretty tame compared to the LS engine GM is putting in a plain boring pickup trucks. And that stock LS engine in the mid 90's Firebirds etc was 1-1/2 to 2 seconds faster than my GN. For some reason however I still want to think that my GN is "better". I've drove baling hay and straw starting at age 3 years,three months on the 60 pulling the 14T. dad would jump off the wagon at the end of the field and help me get the turns made. Then on the wagon behind the baler or in the barn's haymow slugging bales well before my teens.

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Tx Jim

06-02-2006 03:49:50




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 OK I'll buy a 6630 in reply to buickanddeere, 06-01-2006 18:48:42  
Three years,4 months of age driving a tractor? I surrender but I wouldn't let a 3+ year old child be on a running,moving piece of machinery alone!!!!! !! Tx Jim



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buickanddeere

06-02-2006 09:13:48




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 Re: OK I'll buy a 6630 in reply to Tx Jim, 06-02-2006 03:49:50  
I didn't say it was a good thing and at that age it seemed ok to me. And way back in that era before seta belts in cars etc. It didn't seem all that dangerous. Some kids can read fluently at age three, some can drive. Of course now my kids all wore helmets, gloves, knee pads and shin/knee pads when riding bikes.



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Bill(Wis)

06-01-2006 19:39:04




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 Re: Who says 40% of 4020's are still running? in reply to buickanddeere, 06-01-2006 18:48:42  
There are some things you can't kill with a stick. One of them is the merits of a 4020 over ANYTHING. I was hung up on the 4020 thing for a while until I looked around and did a little pencil drill. The economics rule in favor of the 6603 plus you know you have a machine with all new parts. Important if you have anything to do in a hurry that needs to get done. True, the 6603's parts will get old. But when the 6603 is 40 years old, the 4020 will be 80 years old. DC3's can still be found in flying condition, at air shows and museums.

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