Hydraulic Pressure increase?

[JimDeL]

I see quite a few posts here that suggest shimming the hydro pressure of a BX up to 2000 psi (or beyond).

What effect does this have on the longevity of the pump? I can't help but think that it would reduce pump life due to increased internal stresses.

Also, what about the life of the cylinders on the loader or other implements?

 

[DustyRusty]

I haven't messed with the factory settings, and I am aware that many others have increased the hydraulic pressure of their BX machines with no ill effects. The only downside that I can see to it is you might push the machine beyond its design parameters and break or bend a digging part that isn't designed to handle the task. I doubt that it would affect the longevity of either the pump or the cylinders. When cylinders start to leak, it is because they have gone beyond the life cycle of the seals. Most times new seals will cure that issue. If one loader cylinder is leaking, the other will start leaking right after you fix the first one, so do them both at the same time.

 

[TheOldHokie]

I see quite a few posts here that suggest shimming the hydro pressure of a BX up to 2000 psi (or beyond).

What effect does this have on the longevity of the pump? I can't help but think that it would reduce pump life due to increased internal stresses.

Also, what about the life of the cylinders on the loader or other implements?

Run time and dirty oil is what kills pumps and cylinders. Both can handle 2000 PSI with no problem. Plus thats the relief setting. The vast majority of the time they are running well below that.

Dan

 

[Pawnee]

I don't have much experience with hydraulics but my policy is to leave everything stock.

Before you mess with it watch this video.

 

[Gb540]

Find the factory PSI spec and set it there.

The engineers had good reason for picking whatever the pressure is. Sure some parts can likely handle a ton more PSI no problem, but remember your tractor is a system and something's going to get overloaded.

 

[BAP]

I see quite a few posts here that suggest shimming the hydro pressure of a BX up to 2000 psi (or beyond).

What effect does this have on the longevity of the pump? I can't help but think that it would reduce pump life due to increased internal stresses.

Also, what about the life of the cylinders on the loader or other implements?

Many who are increasing their hydraulic psi, have tested and found it to be below the factory specifications for their particular tractor. They are only shimming to bring it back up to the factory specifications. A few are going over that specification, but most are just getting to the factory specs.

 

[85Hokie]

I have raised both of my BX's - from 1700 ish to close to 2000 psi,
Makes a huge difference - you can feel it and see it.

AS for why Kubota has it set for a certain spec? IF they set it higher -as in 2000, the FEL would then raise a higher load than the safety margin that an engineer designed and thus get sued.

Same reason or logic that drilling holes in ROPS is a bad idea....

Same reason that hot coffee should not be placed between your legs while driving......

Same reason preparation H has a label that say "do not take internally"

 

[TheOldHokie]

I have raised both of my BX's - from 1700 ish to close to 2000 psi,
Makes a huge difference - you can feel it and see it.

AS for why Kubota has it set for a certain spec? IF they set it higher - and as 2000, the FEL would then raise a load higher than the safety margin that an engineer designed and thus get sued.

Same reason or logic that drilling holes in ROPS is a bad idea....

Same reason that hot coffee should not be placed between your legs while driving......

Same reason preparation H has a label that say "do not take internally"

Assuming puny 1.5" lift cylinders a 300 PSI pressure increase boosts actuator force by 1000 pounds. I would call that significant. Thats why Kubota used tamper proof adjustment screws on the older loader valves

Dan

 

[Pawnee]

I

AS for why Kubota has it set for a certain spec? IF they set it higher - and as 2000, the FEL would then raise a load higher than the safety margin that an engineer designed and thus get sued.

How could it raise a load higher?
Oh, I think I see what you mean - it would raise a heavier load.
That might be clearer in French.

 

[85Hokie]

How could it raise a load higher?
Oh, I think I see what you mean - it would raise a heavier load.
That might be clearer in French.

Ya - my bad, bad sentence - raise more not higher