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John Deere Tractors Discussion Forum
:

4250 load control shaft permanent removal?

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OzRinger

08-14-2020 01:01:07




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Yes I know oil leaks here are a common as common problem on all JD tractors that use this system, but since I never use draft control and the parts to repair the leak on the 4250 are stupid expensive (the hardened bushes are not available as individual items and must be bought pressed into an assembly #AR103729, and on top of that aftermarket parts are not available in Australia.

So can I just remove the whole shaft and plug up the cast iron bosses that hold the hardened bushes and leave it at that?

Or does the load control shaft also act to provide support for the three point linkage arms so can not be removed.

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OzRinger

08-16-2020 15:35:59




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
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I have already replaced the seals three times over the past twenty years, last time a few years ago I replaced the control shaft as well.

I just priced the support from the dealer and they want AU$500 each. (US$350)

I might have to buy some in the US and get them posted here.

Thanks everyone for your help.



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Hay maker2

08-15-2020 09:03:38




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
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Let alone the cost of oil dripping out of the load control shaft. Oil is not cheap and it adds up real quick!



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ss55

08-15-2020 07:45:09




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
What is the cost to fix the load control leaks compared to how much will the resale value of the tractor drop without a working 3 point hitch? You might be able to sell off the three point hitch arms and sway blocks to offset some of the loss in value, but IMHO the loss in value would still be greater than the cost to fix the three point hitch.



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Hay maker2

08-15-2020 04:27:43




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
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Keep in mind that you may of never used the draft control, but the drawbar is pulled from the front of the support (A-Frame). Even with out using the draft control system the the drawbar pulls aginest the control shafts, bushings, and seals. The load / depth shaft and seals are still needed even if your not using the draft.

When replacing, make sure that you shim the support frame side to side and inspect the front pin that attaches the support frame to the case of the tractor. The bushing in the front is ob-rounded (Item #3) so the the load shafts and flex and do it job. I have seen the front pin (Item #11) worn so much that it put additional stress (flexes more than it should) on the load control shaft which severely shortens the life of the seals in question. Don't over look this pin!

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Tx Jim

08-15-2020 04:00:46




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
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Have you replaced any of the newer style bushing/seals utilized on a 50/55 series JD rowcrop tractors??
All parts would include 5 bushings/seals + L/D shaft which is R71375 LOAD CONTROL shaft -165.39 or
from A&I A-R71375 shaft - 121.72 USD
As I previously stated my 4255 is approaching 12,000 hrs of use
with ORIGINAL L/D shaft bushings & has had 1 new L/D shaft installed.

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Tx Jim

08-15-2020 03:36:21




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
HAVE YOU MEASURED your tractors OLD BUSHINGS to be sure bushings are needed????



The way I interpret the 4250 parts R71262 fits in each side of rear drawbar support & R31438 fits in the front of DB support.
Bushing(R71376) fits in the support that bolts to outside of trans case with socket head bolts.

If your mind is made to change support/bushings they are available from an A&I dealer.

A-AR103729 Bushing - BUSHING SUPPORT, LOAD SENSING SHAFT - 157.70 USD

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Chuck from neb

08-14-2020 19:13:19




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
replace all the parts and be done with it



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OzRinger

08-14-2020 15:25:02




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
The part number for the bush is R71376 and it says "This part has been substituted. View Details or add to cart to see substitute part information." If you try to add to cart it adds AR103729 instead, which is the whole assembly.
The part # R71262 is for the bushing that goes into the drawbar front support. It is easily available and cheap.
Looks like I am going to have to bend over.



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Cliff Nelson

08-15-2020 05:45:48




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 15:25:02  
AR103729 is available from A&I for $157.71. Still expensive but cheaper than Deere.



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Tx Jim

08-14-2020 08:15:52




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
No as much as I would like to be able to access JD's old parts page I have to rely on the "new updated,difficult to navigate" version.
To get the parts spec's if available I put part in my signed in shopping cart then right click on part number for spec's.



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Scott 730

08-14-2020 07:40:27




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
Jim, are you still able to access the old JD Parts site, or how did you get that bushing image with all the dimensions on it, like I used to be able to???? Thanks.



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Tx Jim

08-14-2020 04:55:22




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
ID of bushing(R71262) should be 1.209 inches. Frt drawbar bushing R31438 @ $11.10 USD



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Tx Jim

08-14-2020 04:41:48




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 Re: 4250 load control shaft permanent removal? in reply to OzRinger, 08-14-2020 01:01:07  
Have old L/D bushing ID's been measured??? Inside bushings(R71262) are $28.45 each

It would surprise me if L/D control bushings are worn enough to require replacement. My 4255 which utilizes the same parts for L/D shaft has never required bush replacement in nearly 12,000 hrs of use. I have in previous yrs pulled plowing type disk harrow & 24' 3 pt field cultivator over several 1000 acres & still has the original bushings plus rd baled over 150,000 rd bales. I've owned this tractor since '93. The seals have been replaced 3 times(last seal replacement about 2 months prior to today) & shaft once.

Drawbar support & L/D shaft are required for 3 pt hitch to attach to tractor & function as designed.

IMHO these type seals are far superior to seals utilized in earlier JD RC tractors such as 3010,4010.3020/4020.

Another important thing is to shim all side to side motion from drawbar support when reinstalling the drawbar support & shaft

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