Broken again, loosing faith

[Coyote machine]

Wow. I think some of you are over analyzing this potential problem. For the detented lever which has A or B position, one position always makes enough noise it would be hard to miss when it deadheads the hydraulic pump. The other direction on the lever is quieter when connected to something like a hoe. There are two easy solutions: run a loop when nothing else is in the circuit to prevent a deadhead situation, OR remove the detents. As IT said, the valve is detented for a reason, if you want to disable it go ahead- problem solved. If you want the advantage of a detented valve leave it alone and install a loop. Sometimes its not even about not hearing the relief valve whine, sometimes one just forgets to take the valve out of detent position after removing a hoe., and then a pump can be burnt out for no reason and a HUGE expensive replacement cost. One would think that installing a loop hose would be a simple enough solution. I leave my loop on the dolly my hoe rests on when stored to remind me to install the loop when the detented circuit is absent an implement requiring flow. In fact, my dealer was nice enough to make up a hose for me no charge.
Hope this helps.:thumbsup:

 

[aczlan]

Sometimes its not even about not hearing the relief valve whine, sometimes one just forgets to take the valve out of detent position after removing a hoe., and then a pump can be burnt out for no reason and a HUGE expensive replacement cost.

Why would they design a system where a common mistake by the user can cause "a pump can be burnt out for no reason and a HUGE expensive replacement cost"? That whole train of thought seems odd to me.

One would think that installing a loop hose would be a simple enough solution.

So now one needs to keep an extra loop of hose on the tractor at all times?
Seems like a mechanical lock that requires active user input to enable, or a hose that you connect together like Deere, Kubota, Massey, etc have would be a better solution.

Aaron Z

 

[DK35vince]

You can't use loops if your remotes are always conected to something like top and tilt cylinders like mine always are.

 

[murphy1244]

You can't use loops if your remotes are always conected to something like top and tilt cylinders like mine always are.

what happens when your at the end of piston travel?

 

[DK35vince]

what happens when your at the end of piston travel?

They will dead head the pump if the remotes are left on. Thats why I wouldn't want the detent valve.

 

[DK35vince]

Why would they design a system where a common mistake by the user can cause "a pump can be burnt out for no reason and a HUGE expensive replacement cost"? That whole train of thought seems odd to me.

Your not alone. I don't get it either.

 

[vtsnowedin]

Wow. I think some of you are over analyzing this potential problem. For the detented lever which has A or B position, one position always makes enough noise it would be hard to miss when it deadheads the hydraulic pump. :

Well I wrote my comments at the beginners level as that's where I spend most of my time and if you lay it out at that level the newbies on the board can follow and the eggspurts can chime in as they feel appropriate. I can't ,without Googling it ,draw you a diagram of a detent valve or explain how they work. Therefore I have no real idea how their operation interacts with relief valves and supply pumps. Hopefully someone here has it down pat and will take the time to enlighten me and all the others on the forum that don't have that info at their finger tips.

 

[phiferpharm]

Well I wrote my comments at the beginners level as that's where I spend most of my time and if you lay it out at that level the newbies on the board can follow and the eggspurts can chime in as they feel appropriate. I can't ,without Googling it ,draw you a diagram of a detent valve or explain how they work. Therefore I have no real idea how their operation interacts with relief valves and supply pumps. Hopefully someone here has it down pat and will take the time to enlighten me and all the others on the forum that don't have that info at their finger tips.

VT- The bottom line is that when you release the stick for the front loader, it stops doing anything at the point you release it. With the detent valve, it can lock in a position where it is trying to move hydraulic fluid through the hoses even though you have released it. You will likely hear that the noise is different and if you wiggle the stick it will center up and stop trying to move fluid. The "loop" is just a piece of hydraulic hose with the correct couplers for your set up that will allow the fluid to just circle back into the hydraulic tank if you accidentally have the stick all the way one direction or the other and clicked into detent.

 

[vtsnowedin]

VT- The bottom line is that when you release the stick for the front loader, it stops doing anything at the point you release it. With the detent valve, it can lock in a position where it is trying to move hydraulic fluid through the hoses even though you have released it. You will likely hear that the noise is different and if you wiggle the stick it will center up and stop trying to move fluid. The "loop" is just a piece of hydraulic hose with the correct couplers for your set up that will allow the fluid to just circle back into the hydraulic tank if you accidentally have the stick all the way one direction or the other and clicked into detent.

I hear you on that, makes perfect sense, but why the relief valve would not pass enough fluid to protect the pump from over heating and damage is the point I'm mystified about. Are the respective parts not matched properly?

 

[IslandTractor]

Mechanical lock that requires user action to lock it open?
IMO having a control that can easily be bumped into and (by doing so) can cook your pump if unnoticed is at best a design flaw. If it wasn't a problem, they wouldn't have put out a TSB on it saying that that is not a warrantable issue.

Aaron Z

It is industry standard. Nothing weird about Kioti which you seemed to think.