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John Deere Tractors Discussion Forum
Show Parts for Model:

JD 630 Killed Itself? Kinda Long Post

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igrowtomaters

07-07-2014 22:09:19
198.11.125.253



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I got our ol 630 running today after sitting for about 3 years. Rebuilt the Carb, Distributor, put in a new battery, she fired right up. Ran Great. Dad said hook it on the disc and get some of the weeds down in the pasture area. Ok sounds good. Backing up to the disc, the drawbar was too high, so I took the drawbar out, flipped it around, as I was hooking up the disc tongue to the drawbar the tractor started to act like it was working under load and bogging down, I looked up quickly thinking it was driving away, but it wasn't, by the time I looked up it had quit running. I hit the starter button, I could hear it engage, but wouldn't turn the flywheel. Dad come down with another tractor, we tried to pull start it, and the engine was not turning over and was seized. I thought oh no, Ive heard that the pulley side main bearing on the 620/630 tractors were prone to getting clogged oil supply passages, Does this sound like that scenario to anyone that was had this happen? the engine doesn't turn over and is stuck after running about 5 minutes. The tractor had good oil pressure the whole time it was running, but maybe the gauge was getting pressure and the main bearing wasn't? How big of a project do any of you forsee this repair being, any thoughts or ideas are appreciated. Thanks Yall

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John VB

07-10-2014 10:14:29
139.55.239.123



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to igrowtomaters, 07-07-2014 22:09:19  
Heh Ron,

I've got a 620. Is this something that should be done to preempt a failure? How difficult is it to do? Thanks.



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BushogPapa

07-08-2014 19:32:11
173.88.50.145



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to igrowtomaters, 07-07-2014 22:09:19  
IF that is what happened...when you get ready to Re-install that (either) Bearing Quil, put a short piece of Threaded Brass Tube in place in the existing Threads for the oil feed, extending enough to prevent that "O-Ring" (that JD calls a Gasket) from migrating into and blocking the passage.. The size is about what you will find in old living room Lamps, with the chord running through, to the fixture and works perfectly..Correct thread and all.. New Main Bearings are "Under-size and can be Brass or Aluminium.. Clearances differ with these, but NO less than .005"

Ron.

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Bob0465

07-08-2014 15:44:55
71.127.146.26



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to igrowtomaters, 07-07-2014 22:09:19  
that's what my 630 did, left main seized up when tractor was idling. I had drained at least 5 gallons of gas out of crank case the day before, damage had already been done. had hole in carb float fixed and always shut gas off before I turn ignition off. That way I don't forget.



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rick deere

07-08-2014 07:23:42
96.43.46.50



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to igrowtomaters, 07-07-2014 22:09:19  
take plugs out and try to turn motor over.



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Greenday

07-08-2014 05:05:05
65.255.131.188



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to igrowtomaters, 07-07-2014 22:09:19  
Sounds to me like the crankcase may have got filled with gas from the carb needle leaking by and diluted the oil. Check the oil and see if it smells like gas or is overfull. Dave



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Gtx1967jewison

07-08-2014 06:48:35
198.202.203.177



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 Re: JD 630 Killed Itself? Kinda Long Post in reply to Greenday, 07-08-2014 05:05:05  
Diluted oil will run all day even under load. It just causes rapid wear. Yes I'm guessing your right main is seized. But it's a guess.



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