Thinking of getting a 8630JD for pulling a fert spreader and maybe some planting or drilling duties. Heck w/ a PTO it might find a big square baler tied to it.

I found one for 10K with what sounds like a blown head gasket, said there is coolant in the oil and white smoke. Has 3yrs on the rebuilt engine and 2yrs on the tranny w/ receipts.

The other is for 20K w/ 9800hrs, decent rubber. Comes with a 31ft chisel and 24ft disk for the price.
 
I'd be careful with the 8630. It's an old tractor and has been around the block a few times by now.The liners could be recessed in the block and the only good cure is to strip the engine down and take it to a machine shop. Jim
 
My Brother and I bought an 8630 brand new in 1979, it was setting there as the 8640"s came out, we rolled the tach on it twice,,worked the snot out of it, and yes we did plenty of work on it too...
 
(quoted from post at 20:56:14 06/09/13) My Brother and I bought an 8630 brand new in 1979, it was setting there as the 8640"s came out, we rolled the tach on it twice,,worked the snot out of it, and yes we did plenty of work on it too...

What are some of the main fail points? I dont plan on working the snot out of it but it will be worked steady hopefully. I am primarily no till but I have a few customers that still want their ground worked.

I know things like pins/bushings in the center, U Joints, and other things in that area are subject to wear. Are they prone to faster wear than other models?

The main goal is to have a fert rig to compliment my precision soil sampling and maybe pull a pull type sprayer through pastures. I really like the idea of having a usable tractor after spreading fert and not have a spreader truck with only one use.
 
The chisel,tires, plus disc and fact that it is
running with out having to redo it sounds
better.The 8630 had a decent cab the rest could
have been better.The Steigers and Versatiles were
made to last.Our 8630 seemed like it liked to go
back to the JD more than We had hoped.Sounds like
you are going to use it for lighter work so should
be fine.Usually collant lose and smoke,equate to a
few thousand $s.Past rebuild doesnt help much.I
would be surprised if the 9800 hr one has not been
gone thru.Very few made it past 6000 hrs.
 
I have been "well" versed with 84 & 8630's, One of the engine faults is the cam gear that drives the oil pump can fail at about 9,000 to 12,000 hours, this is why you see a lot of them advertised with a 50 series engine in them,,Deere had a good program back then to replace the complete engine, another weakness was the font end is bolted to the front of the engine block, when the tractor front end oscillates hard against the front stops it can "flex' the block,breaking the crankshaft,I have seen this happen several times on both the 84's and the 86's, the high low planetary has straight cut gearing which set up a vibration that would cause the low clutch to fail, a new complete high/low from a 40 series can be installed to correct this,, these are the main fail points. When Deere went to the 60 series they corrected all of this..
 
A lot of the engine trouble like blown head gaskets, were from guys turning up the engines too hot. If you kept them close to stock I don't think they had as much trouble.
 

Thanks guys, I thought it sounded like a decent deal but I might keep my eye out for a seiger or versatile if I cant find a 60 series for reasonable.

Sounds like there are a few more problems than they are worth. When they break, they break big.
 

Ok, now I'm leaning toward an 8450. Found one with everything but a PTO, how hard is it to add one and how much $$$ are we talking? Has 3pt and 3 remotes along with a dozer blade which could be handy for my pond building and tree clearing buisness.

I know the 466's are solid, what about tranny options and longevity?
 

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