Lenar 254 II Hydraulic pump weak

[Dave M7040]

Okay Guys-
I got the gauge and hooked it up to one of the lines feeding the dump cylinders on the FEL.Ran engine up to full throttle (about 2500RPM) and got 1900lbs.Is that good?At about 1500RPM I am only getting about 800-900lbs.Thanks again very much,
Mike

Mike
Good that you got the gauge and took the fel cylinder reading.

Do you have a rear hydraulic remote outlet you could do the same pressure test on?

I cannot find, in-spite of Google searches, any hydraulic specs at all for your tractor. Do you have any info? Even Tractordata has no hydraulic info.

The pressure reading you got seems low to me. My one thought is to be certain it is not a relief valve in the FEL joystick assembly affecting the FEL reading you took.

The rear remote reading if you have one is just more data and if it is higher then the FEl relief valve may need attention.

I dont want you to think I am backing away from helping you I just need to find some info to compare your readings to.

Do you know anyone with a similar tractor where you could take some comparative readings?

The forums have either happy customers of very unhappy customers as I am certain you know.

I am now going to try and find the web site which might have sales spec's.

Dave M7040

 

[Greygoose]

Good morning Dave-
I just made up a special adapter and got the gauge hooked up to the quick connect fitting on the back of the tractor.I am getting the exact same readings as off the FEL.Is there an adjustment somewhere to bump the pressure up a little?Pressure relief valve maybe?Thanks again very much,
Mike

 

[Dave M7040]

Mike
There would be one or two but I don't know your tractor.
Just adjusting things blindly without a manual can have disastrous results.

I just re read previous info in earlier posts. You talk about the pressure being much lower when the engine is running at part throttle. The pressure would be lower if for example the FEL was lifting its arms without a heavy load as a high pressure would not be needed. The pressure is only going to increase when their is a load to resist.
Think of a garden hose without a nozzle. The water is coming out and falling on the ground a short distance away. Then you put your thumb to partially block the opening, the pressure increases and the water shoots further. In the lower engine speed test you were doing, was the hose where the gauge was attached like a dead end so there would be max resistance?

You talk of having removed the backhoe.

Could there be a short circuit in the removal of the backhoe where some high pressure oil is returning to the reservoir and thus it is acting like a leak as far as the FEL operation is concerned.

Does the backhoe get its hydraulic flow from the same internal pump as the 3pt hitch and the FEL?

Tell me how you came to have this tractor. Bought new, used, from a dealer, are there any dealers you can call?

I cannot find a web site for Lenar USA. Some feel it is a re-badged Mahindra.

Is there any similar tractor within driving distance where you could go and do the same pressure test.

With no manual, and no data, you only have your gut feeling that it is not right. I don't doubt your gut is a good measure it just would be nice to be able to quantify how much off it is.

Looking forward to your next post

Dave M7040

 

[Greygoose]

Mike
There would be one or two but I don't know your tractor.
Just adjusting things blindly without a manual can have disastrous results.

I just re read previous info in earlier posts. You talk about the pressure being much lower when the engine is running at part throttle. The pressure would be lower if for example the FEL was lifting its arms without a heavy load as a high pressure would not be needed. The pressure is only going to increase when their is a load to resist.
Think of a garden hose without a nozzle. The water is coming out and falling on the ground a short distance away. Then you put your thumb to partially block the opening, the pressure increases and the water shoots further. In the lower engine speed test you were doing, was the hose where the gauge was attached like a dead end so there would be max resistance?

You talk of having removed the backhoe.

Could there be a short circuit in the removal of the backhoe where some high pressure oil is returning to the reservoir and thus it is acting like a leak as far as the FEL operation is concerned.I don't believe so as the connection is the hoe connection that I used for the test.

Does the backhoe get its hydraulic flow from the same internal pump as the 3pt hitch and the FEL? Yes is does.

Tell me how you came to have this tractor. Bought new, used, from a dealer, are there any dealers you can call? I bought it used,I do have a parts supplier that I can call that knows this model well-think I'll call them Tomorrow.

I cannot find a web site for Lenar USA. Some feel it is a re-badged Mahindra.Mahindra supposedly made their 2525 model after this one-I think they bought them out.

Is there any similar tractor within driving distance where you could go and do the same pressure test.None

With no manual, and no data, you only have your gut feeling that it is not right. I don't doubt your gut is a good measure it just would be nice to be able to quantify how much off it is.

Looking forward to your next post

Dave M7040

I answered all of your questions as best I could in your quote above.Thanks again very much Dave.
Mike

 

[Dave M7040]

Mike
It would help me to better understand your tractor if you could post some pictures.

Not of the shinny tin but where they hydraulic pump is, the filter, the fel valve and hoses, the underside if there are external hydraulic lines.

Where the backhoe was attached and how the hoses are connected or not when the backhoe was removed.

Do you even have an owner's manual?

Dave M7040

 

[Greygoose]

Hi Dave,the owners manual doesn't have anything at all about the hydraulic system.I have it and a parts manual for the whole tractor but no specs on hydraulic pressure.Let me get you a few photos loaded.Thanks again so much,
Mike

 

[Dave M7040]

Mike

The parts diagram would help show where the relief valve is.

Can you scan or photo it?

Dave M7040

 

[Greygoose]

The first photo is of the rear quick connect for the backhoe,the rest are of the pump and whatever that small junction implement is behind the pump?

 

[Dave M7040]

Mike

How about we switch to email for the next couple of photos.
This is because I don't know how to go to the web hosting service you used to post the pictures so what I did was to bring up pump3 and screen shot it.
I am trying to get all the detail I can as you will realize with my next request of you.
david.petepiece@sympatico.ca
This photo may be of the relief valve and I cannot be confident of the details it is telling me in your photo. Further you are having to size the web hosting photo to not be too large for a forum post so perhaps there is more detail in the photo you take than what comes to me from the hosting service

You need to clean this area in the red square with brake clean or some solvent and even use an old tooth brush or fingernail brush to get the numbers as clean and legible as possible
Take a number of pictures from different positions so the reflection off the part is not blocking out info.
The number I am pointing the red line at. Lets assume my guess of 10.5 MP is correct. The MP is a pressure scale and equates to 1,522 psi
That is why the detail is so important.

When the hoe is removed where is the return line and can you photo it on the tractor.
Now take some shots trying to give me a sense of how the components in the first set of photos connect to each other.
These photos can come through the forum as you did with the first set.
The parts diagram would help show where the relief valve is. Can you scan or photo it?

Do you have to move a lever to direct the hydraulic flow and pressure to the hoe, the FEL or the 3pt?
Take a picture of the lever and any labeling around it.

Dave M7040

 

[Greygoose]

Ok Dave,I'll get all of this to your email tomorrow,I ran out of daylight today.Talk soon,Thanks again so much for all of your help!
Mike