question about detents

[/pine]

My loader valve has a float detent that has quit working (won't stay locked in)...so I've ordered the parts...while doing the research for the parts I saw a "detent regen." (regeneration) also listed...my valve does not have this but I was wondering what it does and when it is beneficial to use ?

 

[J_J]

A valve with regen will close off the one work port to the OUT port and allow the cyl to be faster. It is usually used on the dump side of the bucket.

Some regen functions are in the first part of the valve and others are in the last part of the valve lever movement.

Although the cyl is faster, it also has less power.

 

[/pine]

A valve with regen will close off the one work port to the OUT port and allow the cyl to be faster. It is usually used on the dump side of the bucket.

Some regen functions are in the first part of the valve and others are in the last part of the valve lever movement.

Although the cyl is faster, it also has less power.

Thanks for the reply...but I'm still not sure of the benefits or how it would be used

If it's a detent what happens when the joystick is set in the 'Regen.' detent position ?

FWIW here is the blow-up

 

[J_J]

What I am thinking is that the regen is not a hard detent that will lock the lever in that position, but is essentially a soft stop to let you know you are in regen.

When you release the lever, after using regen, the lever will return to neutral.

 

[Leejohn]

The way my regen works is; It's the 1st position, the pressure coming in by way of load check galley to A port. Spool opens B port at the same time only to the load check galley and tank galley is blocked by the spool. A port extend the cyl. and oil comes from B port together with incoming pressure.oil from pump. All the way to the right psi oil goes to A port by way of load check galley and B port is open to tank and load check galley is blocked by the spool. The power is the same, the relief well open with both systems. That is why the 2nd. position is slow.
I don't use the reg dump it's a pain. You have to push it past regen 1st and I can't control the dump very good. I think maybe the reg system has to be there so you can have regen.

 

[/pine]

Thanks again for the replies...I was mostly just interested in learning what/how the "REGEN" works and why it would be useful...
FWIW..:thumbsup:
I found the below from another forum that I believe was posted by TBN's 'KennyD'

Regen is a "feature" of most modern FEL (Front End Loader) valves, it's on the Dump (joystick far right) circuit, and is also referred to as "Fast Dump". The reason it is nice to have is that without it, the weight of a filled bucket can actually "pull" the bucket down faster then the fluid can enter the other side of the cylinder, this will create a air pocket and give the bucket a "floppy" feeling until the joystick is held in the dump mode a few seconds to refill the cylinder pushing the air past the seals. So we add "regen" or "regenerative" function to the valve.

Regen solves this problem by actually filling both sides of the cylinder at the same time with hydraulic fluid. But how will that work you might ask? Well, because there is more volume on the side of the cylinder that extends it since the rod is taking up space in the other side, it "overpowers" the rod side and lets the cylinder extend-thereby dumping the bucket. So since now both sides of the cylinder are "pressurized", the air pocket can not develop, eliminating the "floppy" bucket syndrome. One other added bonus is that the bucket actually dumps faster due to the higher flow rate required to do all this, that's why it's referred to as "fast dump" sometimes.

So, now you may be asking 典his is cool and all that, but why do I need to know about it? The answer to that is simple, if you ever try to run a snow plow with two SA (single acting) cylinders, or a cylinder that drives a chute rotator on a snowblower you will soon find out that they won稚 work if you push the joystick to far right in the regen mode. The plow won稚 work because since both lines are pressurized-both cylinders will be trying to extend at the same time binding everything up. The rotator won稚 work because there is no weight pushing the cylinder closed like there is on the loader.
On most, if not all John Deere tractors there is a 斗ockout the limits how far the joystick travels to the right to keep it out of the regen mode.

hope this does not violate any copyrights etc...