What does power-beyond really mean?

[TTTTTT]

Thanks Kenny.

I suspected that but needed confirmation. I see your keeping busy on all the threads.

Thanks again for taking the time. I'm sure there will be more

Dave`

 

[kennyd]

I see your keeping busy on all the threads.

Just trying to help

 

[3RRL]

Hi Dave,
So what you are saying is your fel valve right now uses the "T" port to feed the 3pt, right?
This is how my Chinese tractor fel valve was originally set up. No power beyond port to feed the next valve. I don't know if indeed your system has a high pressure return line, at least it's not rated for 100% pump psi from what I read. So without power beyond feeding the next valve in line you are still subject to blowing an "O" ring when using a valve down stream.

Having said that, I know there are set ups just like yours that work. (The Jinma was set up like that)
So what you are proposing to do can work ... just not what I or others would recommend, or how it really should be plumbed (ie. without PB). Keep this in mind ... if you use the "T" port to feed your new valve, and your new valve "T" to feed the 3pt valve, it will probably work just like it's working now, but is more prone (IMHO) to failure because of no PB.

On your valve, I'll bet that top plug right now is an alternate return to tank port.
If indeed that top port is an alternate return to tank (or alternate "T" port), you can only use one of them and must plug the other when using it to feed the next valve in line. Many valves have two ports for ease of use or plumbing them.

Your valves must be better than what mine were.
I got lousy performance plumbed that way which lead to valve malfunction. I ended up replacing the original fel valve with one that had PB on it. The other valves I bought to add remotes etc, all have PB on them to feed the next valve in line. So right now, even my 3P valve is being fed by a PB from the valve in front of it. All the valves with PB on them have a separate return to tank "T" port. I ran those to tank and some are Teed together returning to tank under low pressure.
Rob-

 

[TTTTTT]

Hi Rob

I've read through this thread and I see what everyone is saying about the higher pressure on the return side and the potential problems. I'm thinking if they designed with that in mind including the FEL valve the system should be able to handle it. Lets hope. Even if the FEL is out of the loop, the pump goes direct to the rear remote valves and then to the 3pt. (see pics) As I mentioned there is full flow to the 3pt when other valves are in neutral position. Plumbing it this way is definitely a simpliar way (everything in line). Hopefully time will tell if its right. I'm not going to say the DF's are that much better than other Chineese tractors, but maybe they are a little more up to date on their tech end.

 

[AKKAMAAN]

PB is also called series/parallel connections. Here is a PDF that explains it rather well.
View attachment 96674

This pdf have a picture captured from JD Hydraulic litterature from the early 70's I believe.....

Excellent explanations and color pictures of all kinda of systems and setups on JD agriculture machinery.

Does anyone have a copy of that Book??? It is Grey/Silver colored...and the size of it is about 10x10" and 1/2" thick.