I have a 2020 model L2501 that I bought with 98 hours on it. The tractor now has 278 hours. Ever since I bought it, I have noticed that if the 3 point is in the fully lifted position that the front bucket will barely operate. I can lower the 3 point an inch or two and the front bucket works fine. A few months ago, I began to notice that the front bucket was not lifting as much weight as normal. It has now gotten to where it will barely lift the bucket with 100 pounds of weight in it. All the functions ( up, down, curl, dump ) works like they are supposed to- maybe just a little slower than it used to. I have unhooked all the hydraulic hoses and reconnected at the joystick control box. I have changed the Hydro fluid and filter. I have bled the system by opening fittings at the bucket, etc. Does this sound like a bad hydraulic pump?? Maybe a bad control valve at the joy stick? Any suggestions appreciated. A control valve is $1160 just for the part and the pump is around $400. Thanks
No lift power
- Thread starter goblerblaster
- Start date
Not familiar with your tractor. Does your control valve have a return line ? If so then I would try loosening line and see if fluid is bypassing whichever function your trying to ck . If bypassing is it possible to disassemble and inspect seals and possibly repair ? Or taking hose loose at bucket and cking pressure .
Russell King
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L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Here is what I think has been happening in your description of the past performance.
When the three point hitch is raised or lowered there is a feedback to the position valve that tells the tractor to maintain the position. If there is movement the tractor automatically adjusts to get back into the same position. Now if that feedback mechanism is improperly adjusted the small lift arms go so high the hit a mechanical stop and the relief valve in the three point hitch is activated (a squealing sound starts). The hydraulic flow is basically open to the transmission sump. If you then try to use the FEL valve it is unable to divert oil and pressure to the cylinder (easily) so it moves slower and can’t lift as much as normal.
There is also a relief valve in the FEL valve that may be set too high and that activates the 3PH relief valve frequently, but that just limits the amount of pressure that the FEL can lift.
So I think that now you should start by finding the feedback mechanism that should be attached to tabs on the small upper arms and other end at the tractor case. Then adjust it properly to see if that fixes your past and current problems both.
For your current situation it sounds like one or both of the relief valves are going into a bypass situation and dumping fluid that you are trying to use at too low of a pressure. Could be a broken spring or something caught in the seat of the valve.
I‘ll try to find a link to a similar problem that shows the adjustment
When the three point hitch is raised or lowered there is a feedback to the position valve that tells the tractor to maintain the position. If there is movement the tractor automatically adjusts to get back into the same position. Now if that feedback mechanism is improperly adjusted the small lift arms go so high the hit a mechanical stop and the relief valve in the three point hitch is activated (a squealing sound starts). The hydraulic flow is basically open to the transmission sump. If you then try to use the FEL valve it is unable to divert oil and pressure to the cylinder (easily) so it moves slower and can’t lift as much as normal.
There is also a relief valve in the FEL valve that may be set too high and that activates the 3PH relief valve frequently, but that just limits the amount of pressure that the FEL can lift.
So I think that now you should start by finding the feedback mechanism that should be attached to tabs on the small upper arms and other end at the tractor case. Then adjust it properly to see if that fixes your past and current problems both.
For your current situation it sounds like one or both of the relief valves are going into a bypass situation and dumping fluid that you are trying to use at too low of a pressure. Could be a broken spring or something caught in the seat of the valve.
I‘ll try to find a link to a similar problem that shows the adjustment
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Dan
The only thing wrong is the adjustment on the 3pt feedback linkage. It costs ZERO and takes 5 minutes to adjust. Read your workshop manual.
Dan
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North Idaho Wolfman
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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Yeppers it needs the feedback linkage adjusted.
If it has done it too long you could have damaged the pressure relief, causing a weak system.
The tests for that are in the WSM along with feed back adjustment.
If it has done it too long you could have damaged the pressure relief, causing a weak system.
The tests for that are in the WSM along with feed back adjustment.
Russell King
Well-known member
Lifetime Member
Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Here is a thread that shows the adjustments on a couple of different tractor models that are a few years apart.
www.orangetractortalks.com
L2850/BF500 Pressure test question
I’m looking to test relief valve and pressure on my L2850 with attached BF500 FEL. I’ve searched the old threads I could find, but have questions: -could I insert a 3000psi test gauge into the quick disconnect between the front hydraulic block and the loader control valve body by using quick...
www.orangetractortalks.com
Thx for thw input. I have never adjusted anything on
Thanks for the info. I do not have a shop manual. Cam someone explain to me how to adjust it? The FEL used to work fine as long as the 3 pt hitch was not in full up position, but has recently not lifted much no matter where the 3 point lift lever is.
Russell King
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Lifetime Member
Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Here is the process for the L3301/L3901 your tractor should be very similar. Steps 1 thru 10 are all you really need to worry about. Correct the adjustment so the loader works with the 3pt full up. If you still have problems after fixing that follow up here.
Dan
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One other thing since apparently its now not working at all. Do you have a backhoe, rear remotes, or loader third function on the tractor?
Dan
I guess .I don't get it. I have never adjusted anything on this tractor. It just stopped lifting any weight. Should it have stopped lifting when it used to?? I'll try the suggestions above but I don't understand why it just stopped lifting at now 260 hours, Is that normal>
You have been operating the tractor with the 3pt lift out of adjustment.
How it got that way is an open question but it is not returning the 3pt valve to neutral at the full up position. That is immeriately evident from the loader behavior which you have been ignoring
Here is why you cant ignore things like that. With the 3pt raised the 3pt circuit is blocked forcing the hydraulic system to unload through the pressure relief and run continuouslly at full system pressure. That is BAD for the pump, it irs BAD for the main system relief valve, and it makes everything run hot. The pump and relief are not designed for that sort of abuse and you may have damaged one or both.
Now you are going to have to trouble shoot the hydraulic system to see what if anything has been damaged.
Dan
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Where is the relief valve and how do you tell if it is working or not based on step 10 in the adjustment instructions above? Thanks for the help. My tractor is at my farm so I am not there but a couple of times a week
Russell King
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Lifetime Member
Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
The relief valve makes a sound when it is operating (open). It is a squealing sound as the relief valve opens and closes repeatedly.
I would assume you would hear it if your pump is working correctly and you put the three point hitch all the way up. I assume that it was in relief until you lowered it a little and that made the FEL start to work better by keeping the valve closed.
I would assume you would hear it if your pump is working correctly and you put the three point hitch all the way up. I assume that it was in relief until you lowered it a little and that made the FEL start to work better by keeping the valve closed.
The relief is in the outlet block where the loader is connected. You can usyally hear it when it opens. If you dont have enough pressure to operate the loader you wont be able to afjust the feedback rod.
Dan