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| I am looking into buying a good older horsepower John Deere 4wd to use a good 150 hours a year. I have heard people having trouble with the 8630 transmisions. Is this true? Any pros and cons about these series tractors. Dont know much about them, thanks in advanced for any help. |
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Bardstown,KY | I had a 8630 that I bought in 1998 and sold it in 2003 ,learned more about how to work on a tractor than I wanted to.I don't really understand why they give so much trouble the same setup works great in many other tractors. I didn't even work mine very hard ,before I bought mine I had a neighbor tell me to by a 8430 instead of a 8630 but looked so much alike that I went with the 8630 when I found one .He ran his 84 with little trouble and I worked on mine all the time.
Did the transmission twice once the top shaft locked up have no idea why ,the 2 time the top shaft locked up because the pin came out of the spider gears and knocked the oil line off the back of the shaft while driving down the road ,trashed it.
Maybe I just had bad luck but seems that others have had bad luck also. I would not buy a 8630 the others I know nothing about when I was trading tractors the other models reminded me to much of my old trctor to buy one ,they may be great tractors. Im sure there are some people that like there 8630 JMHO.
I like my 8300 alot better untill I hook to our scraper than I don't have enough tractor. |
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| The 8630s had a lot of engine problems as well & most have been updated to the 8650 engines. Make sure the one you are looking at has been updated. Don't know about tranny problems. Friend had a 8630 that had a 425hp Cummins in it & he ran it for several years without any problems. I didn't run JDs at that time but if I was you I'd be looking for a 8650 just from what I have heard if Iwas wanting a JD. Otherwise I would look at a Versatile. Cheap & dependable but like any other tractor it depends upon how it has been treated.
Edited by boog 7/15/2006 16:17
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Mid-East Nebraska | If you buy one, buy one that didn't have a doser blade on it. That is hard on the engine and Trans. A late 40 series or 50 series is better. |
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| There are two types of these tractors -- those that have blown, and those that are going to blow. Maybe also a third category: those that are going to blow again.
If are set on buying a JD, then by all means go ahead. Don't subject yourself to any psychological or emotional problems from driving a tractor of a color which you do not like.
I reccomend that you find a Versi or a Steiger. Find one with a Cummins 855.
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Bardstown,KY | I don't know anything about the versatiles or the stigers but they have to be better.The 8640-8650 may be better than what I had but I would never live it down if I bought one and it did not hold up .And the statement about how they are treated is true my tractor was old and used when I bought it and could have been treated very bad by many different owners it looked good and that is all you can go by when buying at auction BUYER BEWARE. |
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Southwestern Ohio | I have been told that the 8630 does not have a pressurized lube on some aspects of the transmission ( I may have the wrong component, not sure!). In all cases I have been told to stay away from the 30 series. Go to the 40 and 50 series. Better luberications and components.
Good luck |
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Bardstown,KY | You could be talking about the front reareand they had trouble out of them to.Mine had just been worked on when I bought it the only part I never got to work on.
I sure hope the guy that bought my old tractor doesn't read this forum LOL . |
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Sunburst Montana | I tend to lean towards Versatile and Steiger just because they are cheaper to overhaul. Today I would never buy a used JD 30/40/50 series. That being said our 950 Versatile blew up at 3,000 hrs and our neighbor's NH 9882 that has just over 4,000 hrs just got sent down the road yesterday due to a knock in the engine. But I look across my field and see my neighbor's JD 8850 with almost 8,000 untouched hrs still going. They have another one with 4,700 hrs and it hasn't been worked on. Have seen several other 30-50 series with high hrs and no problems. The Deeres will last as long if not worked extremely hard. IMO they can't as much abuse as the Steigers and Versatiles due to their designs. |
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Brazilton KS | The 86x0 and 84x0 are the same tractor behind the engine if the same age. A lot of the problems with the 86's can be traced to the fact that Deere did not make a 400 hp tractor....if you were a died in the wool green guy and wanted a big tractor you couldn't buy one, so you got an 86 and asked it to do more then it could. The 84's didn't suffer this as much, and they had a bigger margin of safety built in to begin with. The pressure lube vs not thing has to be the front axle. I'm not so sure it's a big deal. No other 4wd tractor of that age has a pressure lubed front (or rear, for the most part) axle. I think the biggest problem was that the front axle had it's own lube compartment and Deere guys were not conditioned to deal with that. Steiger or Versatile had front axle, rear axle, LF final, RF final, RR final, LR final, and transmission all seperate and knew they had to take care of them all. It could be argued that the pressure lube changeover merely provided a way to get progressive damage from a front final drive into the rest of the drivetrain. The pinion pin coming loose and knocking the lube pipe off is not in any way confined to the 8630....it can and does happen on any Deere that has two a two pinion differential. I'm not sure if the 3 and 4 pinion designs had some way to prevent this or not. We've had it on a 7520 and a 4010...the 4010 had the pin break, the 7520 just sheared the bolt that holds the pin in off. The 4010 busted the pin up in little pieces and didn't do any further damage, 7520 knocked the tube off and trashed the transmission, but there is a possiblity the progressive damage could have been prevented if we had been smart enough to park it the minute we heard the "chunk" (which turned ou to be the pin coming out) instead of moving it the rest of the way home.
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UP / Thumb of Michigan | We first had a 7020, then a 7520, then an 8640. The 8640 was by far our most expensive tractor to keep running we've ever owned. And they were a step up from an 8630. I'd agree 100% with some of the other posts- look for any color with a 855 Cummins in it. |
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Bardstown,KY | Your right the pin coming out was not because it was a 8630 we had a 4240 that had the pin come out to. That was just something that came to mind right then . I think that if you buy one of the deere's that you will spend alot to keep them going and won't be happy. JMHO |
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| I have an 8630 I want to sell asking 21,000 email [email protected] |
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| I have an 8630 been using it eight years not one bit of problem with it. Maybe your maintenance program needs to be looked at. |
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So. IL | Ask all you want, but consider yourself lucky if you find a buyer that will give you anything more than $15K. Most of the 8630's sold around here sell for less than that. |
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John Deere 8630, 8640, 8650
