John Deere 4500 3 point bouncing up and down: John Deere Review  -- John Deere Tractors Discussion Forum and Review John Deere 4500 3 point bouncing up and down: John Deere Review -- John Deere Tractors Discussion Forum

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 03-30-2011, 15:58 Post: 177704
klcdkdk



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 John Deere 4500 3 point bouncing up and down

Got a JD 4500 and the 3 point with something on it is bouncing up and down. Went in and put new seals and o-rings on lift piston but no change. Checked relief valve looked ok . Got any ideas?






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 03-31-2011, 15:29 Post: 177726
DRankin



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 John Deere 4500 3 point bouncing up and down

No clue.... but very interested in the answer because my 4115 is doing the same thing.

I noticed it does not do it when the oil is cold. After it warms up it jumps every few seconds.

Do you remember (or know) what type of oil is in your tranny sump?






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 03-31-2011, 15:38 Post: 177727
klcdkdk



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 John Deere 4500 3 point bouncing up and down

Hy-Gard John Deere fluid






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 03-31-2011, 18:33 Post: 177729
DRankin



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 John Deere 4500 3 point bouncing up and down

Which one? Regular or Low-Vis?

The reason I ask is that I changed over from mostly Low-Vis to Regular Hy Gard and that's about when I started to notice the 3 point bouncing.






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 03-31-2011, 18:39 Post: 177730
klcdkdk



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 John Deere 4500 3 point bouncing up and down

Low






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 03-31-2011, 19:01 Post: 177731
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 John Deere 4500 3 point bouncing up and down

Well...... we can eliminate viscosity as an issue.






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 03-31-2011, 19:14 Post: 177732
klcdkdk



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 John Deere 4500 3 point bouncing up and down

Yep
It really has me stumped. Temp does make a difference with mine also though






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 04-01-2011, 13:48 Post: 177747
Murf

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 John Deere 4500 3 point bouncing up and down

Albeit not with a John Deere, but every time I've seen this issue before it was with a leaking control valve, seals normally.

What happens is the 'shock loading' of something like a heavy load, quick travel speed and a bump are more than the seals can handle and the fluid bursts past them. Once that happens they never seal properly again.

Once the fluid gets past it to a certain point the load is low enough to cause the position valve to move it back up to the set point.



Best of luck.






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 04-01-2011, 17:25 Post: 177749
greg_g



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 John Deere 4500 3 point bouncing up and down

Naw, this is definitely a John Deere problem. My new 3720 did the same thing with only 3 hours on it. And I didn't even have anything heavy on the TPH; just a 7' landscape rake. I was raking gravel on my barn drive, and all of a sudden the damned hitch started pulsing. Jumped about an inch every 1-2 seconds. It quit if I pushed the lift lever all the way forward, but of course that's the open center position. Soon as I pulled the lever back even a fraction, the rake started jumping again. FEL worked fine, problem was only with the TPH.

Shouldn't have overheated fluid for such light work, but I shut the tractor down anyway. Came back again in 30 minutes, problem had gone away. I did eventually discover that the tractor was delivered to me 6 quarts low on HyGard (LoVis). I topped it up, problem hasn't happened again - so I'm wondering if there wasn't perhaps an air bubble in the rear lift circuit that caused the position control to go nuts.....

I couldn't re-create the issue - which as you all pretty well know - means they reflexively blame the owner/operator.

//greg//






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 07-02-2013, 18:28 Post: 187572
jtdday



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 John Deere 4500 3 point bouncing up and down

MY 4500 HAS A SURG EVERY FEW SECONDS WITH ONLY A WHEELED BAR RAKE ON THE LOWER 3PT WITH FLUID ON THE MARK BUT I HAVE 3000ISH HRS ON IT.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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DRankin 3 | greg_g 1 | jtdday 1 | klcdkdk 4 | kthompson 1 | Murf 1 |




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