JD 4020 8 speed powershift tear down. pt2.

[@CaseysOffRoadRecovery]

Oh man I need this job done on a 4020 Too bad we are clear out in Utah

[@jamisoncurtis2387]

My dad was telling me he felt like my 66 4020’s PTO was slipping while running a round baler. I didn’t notice anything while cutting hay with a haybine. Was curious if all a guy needed was clutch pack rebuilt or there something else?

[@jonstevensmaplegrovefarms3754]

Check transmission pressure, do a little checking around the tractor. But yeah, not hard to believe that the clutch pack might be getting wore.

[@johngassenhuber9872]

In your opinion. What would it cost to rebuild a 8.1 from a 9510 combine done correctly

[@johngassenhuber9872]

Blew out oil filter gasket at cold start

[@jonstevensmaplegrovefarms3754]

@johngassenhuber9872 You'd have a couple of grand at the Machine Shop to recondition the head, inspect the block and install new cam bearings, grind the crank, redo the rods with new wrist pin bushings. Couple grand for the engine kit, and you still need to buy head bolts a new crankshaft dampener Then you need to have about 800 for injectors. pump and turbo could be a few hundred or couple grand depending on damage To have 7-8 grand into a complete overhaul without any in shop labor is not uncommon today. But you have the best quality overhaul you can get. It sounds a little pricey but no way no how what I do at John Deere reman

[@KurtEllerman]

Great video. I just picked up a 1964 4020 powershift. Not running but can't wait to tear into it. Great project, Great tractor! Thanks for the videos.

[@STAFFORDTRUCKING]

Jon I have a 65 power shift. Park doesnt work. Do you have a Email? I can ask you some things? Thank you sir. Keep up the good videos

[@jonstevensmaplegrovefarms3754]

[e-mail]

[@kevinvershum5298]

I love your videos Jon! Both the farming and the fixing. I farm in southern Michigan but I worked at a JD dealer for 12 years after going through their tech program and I really enjoy watching you doing things like this video. Keep up the good work and keep the videos coming.

[@jonstevensmaplegrovefarms3754]

Thank you very much for the kind words!

[@John-Deere]

You're the Master, would like to hear your story how you got started in this business.

[@jonstevensmaplegrovefarms3754]

My dad started at a JD dealer in 64. He opened his shop on the farm in 94 when the local deere dealer stopped doing ag tractors. I went to college in 93 for JD mechanics. At that time, all the guys dad was fixing for were old, he said there will be no one to fix for in a few years. So he never wanted to build a shop and have both of us go at it. Finally, we built this shop so he can retire. Now we have more work than ever.

[@trevorn9381]

What would be wrong with a late 3020 with synchro shift that grinds when shifting between the the gears when the tractor is warm. It does not grind until the tractor has been run a while and the tranny gets warm. Tractor was delivered to our farm new in 1972 and has around 3000 hours on it.

[@jonstevensmaplegrovefarms3754]

Grinding like if you shift from 2nd gear to 5th gear or grinding as you go down the left side from Quadrant to quadrant

[@trevorn9381]

@@jonstevensmaplegrovefarms3754 Shifting between forward and reverse. Like if you are doing loader work when you start and the tractor is cold it shifts from forward gears to reverse and back to forward gears just fine. Once it gets warm it grinds going into gear.

[@jonstevensmaplegrovefarms3754]

@trevorn9381 syncros could be getting worn.

[@dieselgypsy1100]

Thanks for posting this. I have a 760A scraper (basically a 5020) with an 8sp powershift in it. It has a reversing pto which doesn't reverse so I'm going to have to get into it. Do you know if this would be the same transmission as in some ag tractors? (obviously not the reversing pto part!) It would help to know what ag model would fit if I need some parts! Thanks.

[@jonstevensmaplegrovefarms3754]

The 8 speed would be very similar to work on as this

[@dieselgypsy1100]

@@jonstevensmaplegrovefarms3754 I would imagine there are different models of powershifts for different tractor models? Just wondering what the differences would be and which one would be the same internals as the one I have.

[@jonstevensmaplegrovefarms3754]

@dieselgypsy1100 road graders? Otherwise 4840?

[@dieselgypsy1100]

@@jonstevensmaplegrovefarms3754 OK, thank's a lot!

[@Carloszepeda-v4k]

Hello Jon! Thanks for your videos help me a lot. Question I have a 4020 not wanting to move forward at all and hesitates moving backwards but moves. Any ideas?

[@jonstevensmaplegrovefarms3754]

Powershift? Do you have hydraulics? Start with checking transmission pressure.

[@Carloszepeda-v4k]

@@jonstevensmaplegrovefarms3754 It has a front end loader, enough pressure there.

[@jonstevensmaplegrovefarms3754]

@@Carloszepeda-v4k is it a power shift tractor So if the front end loader works that tells us that our transmission pump is working which takes a bunch of other stuff out of potential suspects. So then we would have to look at your shift linkage and see that its operating the valve down there to switch from forward neutral or reverse

[@THUNDER52]

Is it possible to access the trans without splitting the tractor? (Go from above or behind the tractor?) ours only goes backwards and it’s in a stupid spot so either I don’t touch it or I rip the top or back apart. I’m guessing a gear is broken.

[@jonstevensmaplegrovefarms3754]

No you have to split the tractor twice to get to the transmission If it's an early 20 series by your left foot should be a little lever sticking up through the floorboard. That is the tow disconnect. Late 20 series and later tractors under the floor board in front of the left axle is the tow disconnect. Move that and then you can tow the tractor to the shop. Might have just lost the clutch pack for forward.

[@THUNDER52]

@@jonstevensmaplegrovefarms3754 on a diesel model that’s been sitting for a minimum of 10 years, does the engine need a ton of maintenance? Didnt know whether to just catalogue & disassemble the crap outta it or not given its condition. We don’t even own any flat smooth ground on our property so a teardown would likely be easier than trying to tow it unless the tractor is only 8500+lbs. thx for the reply btw

[@jonstevensmaplegrovefarms3754]

@THUNDER52 sitting for 10 years how to send the injection pump and injectors out? They could be varnished and stuck. Run through this for an old neighbor guy fixing up a tractor that sat for 12 years. Had to do the lift pump the ejection pump injectors were stuck but came out of it on their own. Changed all fluids and filters. Condensation gets in there

[@THUNDER52]

@@jonstevensmaplegrovefarms3754 so a complete maintenance then? Would a teardown of the engine be necessary? Ours is on a 30° angle width-wise and we can’t afford a new battery or anything rn so my main goal is to get the transmission figured out IF I can without moving it. One video showed a bolted floor panel in the cab that covered the transmission, I also didn’t know if I could see the gears if I unbolted the back of the tractor and took it apart.

[@jonstevensmaplegrovefarms3754]

@THUNDER52 if it's a power shift when you take off the transmission cover all you'll see is cast iron housing Have to split it at the clutch housing tear out the input clutch pack take a couple bolts out of the transmission and then you split it between the transmission and the clutch housing to transmission housing joint

[@GraysFarm97]

Hey Jon do you have a email I can reach you at I have some hydraulic questions you may be able to answer

[@jonstevensmaplegrovefarms3754]

[e-mail]

[@STAFFORDTRUCKING]

I see the email here.

[@DonBrongo-mi7vt]

Very impressive

[@jonstevensmaplegrovefarms3754]

Ha, thanks

[@vengethis]

Thank you so much! So happy to see a powershift getting torn down. I've got a 4430 8-speed with some issues... Slow shift in 2, 4, 6 and 2R, (or complete loss going movement), weak/chattery hydraulics except at 1800+ rpm . Leaks all over around the valvebodies. Seeing this gives me the confidence to dive into it a little deeper than I have thus far Thanks

[@archerwold9578]

Thanks for the videos on this tractor, I just bought a 4020 power shift that someone started restoring and had taken all apart so this might come in handy to help me put it back together! If you could I would like to see a detailed video on the basic functions and of "how it all works" on these power shift transmissions!

[@jonstevensmaplegrovefarms3754]

What do you mean how it works? The transmission itself?

[@lostengineer3230]

I’ve got this exact PTO issue with my 64 4020, thank you for showing exactly how much I will take on by changing that brake myself, and what to check while I am in there

[@travisschnader]

Thanks Jon! I have issues with my parking paw on my 4020 power shift. This is great video for me to now tear into it and see why it isn’t keeping into park.

[@brettmay3259]

Your videos have been super helpful! We are going through diagnosing a shifting issue on our late serial number 4020 PS like you had in Part 1 of this series and you outlines of splitting and what to look for have been great. Subscribed and will continue to watch!

[@jonstevensmaplegrovefarms3754]

Thank you very much. It's always nice to hear.

[@MortenChristianJensen]

Keep up the good work Jon. I like all the videos. Best regards from Denmark

[@jonstevensmaplegrovefarms3754]

Thanks.

[@danw6014]

Well, anything related to a 4020 great information for me!

[@pioneerpete8170]

I’ve heard of guys not installing those 2 bolts that you mentioned so that way you don’t even need to take the Cab Off in the future. Apparently it’s still plenty strong enough without those 2 bolts installed.

[@jonstevensmaplegrovefarms3754]

I am sure it's strong, but...yeah..

[@Ranchready496]

👏🍻👍

[@farawayfarm2520]

Dad's 3020 had a series of transmission issues. It was a synchro, but I got really good at splitting it. It's not a bad job.

[@jonstevensmaplegrovefarms3754]

Hopefully you got them figured out. Not bad to work on

[@farawayfarm2520]

@@jonstevensmaplegrovefarms3754 It's still working.

[@taylorsunderlage5176]

Good job! Thank you for all your videos! I have a 4020 powershift the pto brake doesn’t always hold but it’s intermittent. I was wondering if there was a pressure adjustment for it?

[@jonstevensmaplegrovefarms3754]

Early or late is a little different lever, but yes it could be an adjustment.

[@taylorsunderlage5176]

@@jonstevensmaplegrovefarms3754 It’s an early

[@TheBnbonthebeach]

Another interesting and informative video from the diesel doctor

[@jonstevensmaplegrovefarms3754]

Makes you want to start farming and fixing!

[@rlweber6161]

Thank you for the great videos. You are very smart and good at these repairs. My only wish would be that you had a camera/phone stand/tripod to put the phone on so when you need both hands to do something, we would be able to see the entire tear down/re-install. Thanks again for sharing your knowledge!

[@jonstevensmaplegrovefarms3754]

I will work on it. The biggest reason I don't is because this is customer stuff and I don't want them thinking I'm wasting their dollars and time on the time clock setting up camera

[@rlweber6161]

@@jonstevensmaplegrovefarms3754 I understand, but if you were able to set up a tripod for the phone and let it run, maybe they wouldn’t complain. Nevertheless, you do great work and help others with your knowledge and experience. Thanks again

[@jonstevensmaplegrovefarms3754]

I will figure something out to do better.

[@danfike3016]

Good videos Jon. Thanks keep up the good work

[@jonstevensmaplegrovefarms3754]

Thanks Dan, sorry I can't call much anymore, new boss doesn't allow me to talk on phone at work. Lol

[@M8Stealth]

Are there any big differences between this 4020 PS and the one in my 4440?

[@jonstevensmaplegrovefarms3754]

As far as design, your 4440 would look exactly the same, Some of the disks in this tractor would go into a 4430

[@ryanlarsen436]

The John Deere videos are great. Are you a professional on the 2 cylinders also? I see you have one in the shop. I grew up on them. 70,720,730 diesel’s.

[@jonstevensmaplegrovefarms3754]

@ryanlarsen436 dad is, technically, we don't work on them, but this one needed just a quick repair.