LK2554 Hydraulic Pump Question

[K5lwq]

I have been researching hydraulic pumps for my LK2554 and ran across an old thread where someone upgraded their LK3054 to a 10GPM pump. Does anyone know if this pump would fit on the LK2554? Tractor Joe is suggesting that their replacement pump fits both models.

The issue I am having is that below 1500 RPM I get very little or no movement on loader or 3PH. I can get 2100 PSI when the tractor is above 2000 RPM. If I try to curl the bucket while raising the boom, the boom will fall at a pretty fast rate. As long as I am careful not to do that, it's not a big deal.

It seams to me that my pump is a little weak and higher flow rate would really help. Any thoughts?

 

[marchanna]

I think you have to consider whether or not your tractor has enough power to drive a higher capacity pump. Your’s has a 7gpm pump which seems properly sized for a 25hp tractor. Your rated rpm is 2600, so as long as it functions as desired at that rpm I would leave it as is.

Is the boom dropping while the bucket is loaded or empty?

 

[K5lwq]

The bucket is empty. Even with the bucket off it still falls. I feel confident I have enough power as I turned the injector pump up and it is a very powerful 25hp now. Been a good tractor but the hydraulics have always been an issue, at least as long as I have owned it. I bought the tractor from a auction and the day I bought it home it slung a rod through the block. The tractor was abused. I replaced the motor and rebuilt the front wheel drive as well as other small repairs.

 

[marchanna]

It sounds like maybe the pump is shot. Have you tested the pressure?

 

[K5lwq]

I have. At full throttle I can get 2100 PSI. It takes a bit to get there. I have always suspected the pump as the issue, but if I could increase the flow a bit in the process it would make things a little better.

 

[marchanna]

It sounds like the pump is weak. It should get up to pressure immediately. Maybe a sticky relief valve?

 

[K5lwq]

I replaced the loader valve and it's performance is the same. I have not replaced the diverter valve but think it is the pump. I am going to replace the pump, just would like to get a little more flow if it is available.

 

[Patches]

My '04 3054xs came with an aluminum hydraulic pump and would hardly curl the loader bucket in live sand after the hydraulics warmed up; it was replaced with a cast iron pump under warranty, which corrected the issue.

 

[K5lwq]

My '04 3054xs came with an aluminum hydraulic pump and would hardly curl the loader bucket in live sand after the hydraulics warmed up; it was replaced with a cast iron pump under warranty, which corrected the issue.

That's the one I am thinking will fit. Is it 10GPM? Would you know the part number?

 

[Patches]

That's the one I am thinking will fit. Is it 10GPM? Would you know the part number?

Unsure of the capacity and I didn't get a work order, being it was a warranty issue. I can check for any #'s on the pump, but the possibility of them being a part # is remote. Looking at the parts manual it appears the original # is T2540-76102 and is replaced by #T2565-76101 on units with serial #E265-00001 and up and that pump replaced by #T2567-76041 on units with serial # F265-00001 and up. Which one is aluminum or iron or 10GPM, I've no idea. My tractor being an '04 has a serial # beginning with "D"