FEL how long 'should' bucked remain up when parked?

[LD1]

Wait - I think I have it with James and Abe experiment example.....
Let me see if I can put this into different language -
The if you put a jar of water on the table and it is completely full. If you drop anything (read penny) the amount of water that will overflow the jar will be the equivalent volume of water. If the jar would have been sealed you couldn't add the penny since you couldn't compress the water...so if a cylinder rod is extended you can shove it back in because you are ADDING the volume of the cylinder to a space already full and the oil can't be displaced....bingo

You got it sir. I'll move your name on the list.

OK, if we ever get him to understand this, then we need to blow his mind with the explanation of "regeneration" as in the regenerative high speed dump function.

Thats another tough one. I deal with regen stuff at work, and you'd be surprised at the number of people that think if you put full pump pressure to both ports, that the cylinder wont move and you will deadhead the pump:confused2:

 

[LD1]

It could still leak out of the end seals onto the ground, but I'm in agreement that if a cylinder leaks down and oil doesn't end up on the ground the valve is the only source it could be leaking.

Yes, thats why I have said in every one of these threads that come up......as long as there are no "external" leaks IE: leaky fitting, hose, leaking out the gland seal, etc. Then the only source is the valve. Even if you completely removed the piston seals and piston. The only way to compress the cylinder is for oil to EXIT the cylinder somehow.

 

[4570Man]

The cylinder will move because it's got more surface area on the non rod side. The only way the cylinder wouldn't move is if you had a check value on the rod side or put higher pressure on the rod side.

 

[k0ua]

You got it sir. I'll move your name on the list.



Thats another tough one. I deal with regen stuff at work, and you'd be surprised at the number of people that think if you put full pump pressure to both ports, that the cylinder wont move and you will deadhead the pump:confused2:

Yeah, they haven't got that rod in the oil thing figured out and that the retract power is less than the extend power due to the surface area the fluid has to act upon. That is a tougher one to figure out than trying to stuff 10 pounds of chit into a 5 pound bag. :laughing:
This has been a "trip" this morning..

 

[LD1]

The cylinder will move because it's got more surface area on the non rod side. The only way the cylinder wouldn't move is if you had a check value on the rod side or put higher pressure on the rod side.

Yep, more surface area as well as more volume. Which is why the cylinder has more force extending than retracting. Also why its slower extending than retracting. Its all directly related. IF you understand one part of it, you should be able to understand it all:thumbsup:

The following 4 still need to understand
Ray66v
OVRSZD
ch1ch2
rd_macgregor

 

[k0ua]

Yep, more surface area as well as more volume. Which is why the cylinder has more force extending than retracting. Also why its slower extending than retracting. Its all directly related. IF you understand one part of it, you should be able to understand it all:thumbsup:

The following 4 still need to understand
Ray66v
OVRSZD
ch1ch2
rd_macgregor

Well, we did some good this morning. We will see about the rest...

 

[LD1]

Yeah, they haven't got that rod in the oil thing figured out and that the retract power is less than the extend power due to the surface area the fluid has to act upon. That is a tougher one to figure out than trying to stuff 10 pounds of chit into a 5 pound bag. :laughing:
This has been a "trip" this morning..

We have been down this road MANY times on TBN. If I cared enough to do a search, just in the last ~3 years, I have probably been involved in a dozen of these threads just like this. No telling how many I have missed. Heck, I almost missed this one. And there was a casual mention about cylinder seals being faulty and then several posts after it before someone chimed in with the correct answer. So it makes me wonder how many times this bad information keeps getting passed around, and no one catches it or corrects it......and its a never ending cycle.

 

[Deere Dude]

So far, in this thread alone, those that are correct are:
CalG
CADPlans
Koua
Jabelding
comancheflight (the OP)
4570man

Those that are incorrect in their understand:
Ray66v
OVRSZD
ch1ch2
rd_macgregor

Would really like to take this opportunity to move a few names off the incorrect list, and up to the list of those that understand, if said people are willing to learn.

I agree with both interpretations.

 

[LD1]

I agree with both interpretations.

Not really sure if thats possible? or what you mean?

Either
1. You believe you can compress a cylinder with no oil exiting the cylinder
2. You believe its not possible to compress the cylinder without oil exiting

 

[k0ua]

I think several people need to go to the kitchen and fill a glass of water up to the brim and then stick their finger in the water column and see what happens. I actually think some people are going to have a problem envisioning this.