Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

4250 wont lift 3 point


 
Post new topic    
View previous topic :: View next topic  
Author Message
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Fri Oct 06, 2017 11:15 am    Post subject: 4250 wont lift 3 point Reply to specific post Reply with quote

Hello
I have just found à problem with My 4250
I have plowing for several days now and now IT just not lift the plow up.
Steering works and IF I turns steering Wheel right to left several Times' IT slowly raises the plow
When i finally had the plow up i couldnt turn IT over.
Its like there is very low hydraulic pressure in the system.
The hydraulic fluid is not very hot at all
I have new oil and filter in the transmission.
And there was ni dirt in IT when i changed IT
I Know erlier when i have lift the 3 point IT have given à little noise like fr.o.m. À valve or something but when this happens its completely quiet.

Please. Does anyone know what problem IT could be?

Thanks C-J fr.o.m. Sweden
 
Back to top
View user's profile
tim s
Tractor Guru


Joined: 01 Nov 2008
Posts: 11396
Location: Somerset Ohio

Report to Moderator

PostPosted: Fri Oct 06, 2017 1:06 pm    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote

The system has a priority valve where the oil pressure enters the rockshaft on the right front of the rockshaft housing, when the system "stand by" pressure gets below 1750psi the priority valve shuts oil off to the rear end and only allows for steering and brakes. there is a stroke control valve on the under side of the front pump, it is a bit ornery to get to,,back the jam nut loose and turn the center screw down a few turns, then run the engine a bit ,,then turn that screw back up a few turns past where it was when you started, at this point you should have a gauge made up to plug into the SCV (where the cylinder hose plugs in) and check the pressure, if all is working well you can turn the screw in or out to get the gauge to read 2250psi,,if it don't work out well the stroke valve is probably stuck..
 
Back to top
View user's profile
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Fri Oct 06, 2017 8:55 pm    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote

hello Tim
Thank you so much for your answer.

Is there any chance you could find a drawing or picture on those valves?
Are then mounted externally or in the transmission?

I could actually hear some kind of oil flow on the tractors left side under the cab behind the batteri IF i have My peltors on and engine running. maybe this is just oil flowing threw the filters?
This is by the way a PS transmission.

Thanks so far
C-J
 
Back to top
View user's profile
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Fri Oct 06, 2017 9:15 pm    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote


 
Back to top
View user's profile
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Fri Oct 06, 2017 9:22 pm    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote

Is this the right place?
Is nr 31 and 32 where i could adjust the pressure?
And 38 the stroke valve that could be stuck?

AND if the valve is stuck
Is that because dirt or metal pieces have come inside?
 
Back to top
View user's profile
Tx Jim
Tractor Guru


Joined: 14 Feb 1999
Posts: 24209


Report to Moderator

PostPosted: Sat Oct 07, 2017 3:17 am    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote


Here's a photo of the priority valve that Tim referred to. It's located on RH side of tractor. If you get 2250 psi stand-by pressure at frt pump but 3 pt/scv's still won't operate correctly then check this valve for being stuck closed


 
Back to top
View user's profile
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Sat Oct 07, 2017 5:35 am    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote

Hello Jim
Thanks for your answer
I tryed i today again and everything works OK
But i can feel When i raise the 3 point that ITs a little bit slower than usually.
Could this be the priority valve.
Or do you think its the valve in the pump.
IF i check the pressure in the SCV
Should the oil be cold or warm or doesnt matter?
I also noticed today that When i turn the steering wheel IT lifts the plow slower.

Thanks for answer
C-J
 
Back to top
View user's profile
Tx Jim
Tractor Guru


Joined: 14 Feb 1999
Posts: 24209


Report to Moderator

PostPosted: Sat Oct 07, 2017 9:36 am    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote


One will get a more accurate reading checking pressure or flow at oil operating temp. Yes a sticking priority valve could be causing slow 3 pt raising but so could low GPM flow. How long since hyd filters were changed & sump screen checked/cleaned??
 
Back to top
View user's profile
Kollebo
Regular


Joined: 16 Oct 2013
Posts: 94


Report to Moderator

PostPosted: Sun Oct 08, 2017 2:20 am    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote

hello

Oil and filter was changed about 50 hours ago.
I also cleaned the screen then but IT was almost nothing in it.
I Will try to take the priority valve apart today.

What do you think about the front pump?

Thanks
C-J
 
Back to top
View user's profile
Tx Jim
Tractor Guru


Joined: 14 Feb 1999
Posts: 24209


Report to Moderator

PostPosted: Sun Oct 08, 2017 2:43 am    Post subject: Re: 4250 wont lift 3 point Reply to specific post Reply with quote


How many psi/kpa stand-by hyd pressure is gauge showing?

Many hyd pumps have been replaced only to find out that pump wasn't the hyd problem.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> John Deere All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters