How to Plumb into this Manifold for Auxiliary Valve?

[npalen]

Asking for suggestions on how to plumb into this manifold on my New Holland TC29DA for a new three spool rear mounted remote valve. The three lines shown are pressure, return and tank.
I'm assuming that the pressure line needs to be plumbed in series for power beyond while the return and tank lines will be plumbed in parallel with existing lines.
The issues I see are space and preserving the existing tubing lines when adding new fittings. The existing manifold is part of the FEL plumbing.

Edit: Thanks for any help you can give me.

 

[buickanddeere]

I'm getting the impression you are thinking closed Center on a open Center system.

 

[npalen]

It would stay open center as is. Just trying to figure out how to deal with the steel lines without making new ones.
The new valve would need to be plumbed into the power beyond coming out of the existing FEL valve into the new valve and then from the new valve's power beyond to the 3-point.
The return and tank lines from the new valve can be plumbed in parallel with the FEL valve return and tank lines. Right?

Edit: Thinking about this a little more, the new valve's return line needs to be set up as power beyond to feed the (next in series) 3-point.

 

[Tractor Seabee]

Return is probably NH terminology for PB used generally. So, the R line is to the next valve. So; Pipe R/PB to the new valve spool P/Power input, PB output back to the original R line, tee the new T/Tank outlet outlet into the existing T line at the manifold. That is what I see, I am no expert either but have studied up on this in preparation to do the same thing you are. Hope you are good with a tube bender and flare tool as new lines will be required.

Ron

 

[npalen]

Thanks for your input, Ron. Yeah, I was thinking erroneously that the pressure line would be plumbed in series then realized that, no, the "return" line (power beyond) is used to power the next valve.
I was wondering, however, if the new remote valve could be plumbed in ahead of the FEL valve. I would reroute the existing pressure line to the new valve first and then use it's power beyond to pressure the FEL valve which then feeds the 3-point valve. Only reason for this would be to facilitate the plumbing. Would use hose from the manifold back to the remote valve and then hose again back to the FEL valve pressure input.
I think that I can get by without bending tubing and save the original tube(s). I'm not opposed to bending and flaring 1/2" hydraulic tubing as I did a lot of it in the past but would need to buy the tools.

 

[Tractor Seabee]

It should work just fine. The key is to keep the P/PB circuit complete. Make sure your new valve is open center with the PB plug in it.

Ron

 

[BukitCase]

One STRONG caution about plumbing in AHEAD of the FEL valve - I did this on my old Case (for a hydraulic sickle bar) and promptly SPLIT MY PUMP WIDE OPEN

The sickle bar hit a really hard limb at close to the max diameter it's rated for (1-1/2") and stalled - the FEL control WAS also the first relief valve in the system, so the pump deadheaded. Being a gear type pump, something ELSE had to give (the cast iron pump body in this case)

I now have another relief plumbed into the system AHEAD of the flow splitter (and AFTER the NEW, expensive pump)

Just a warning, hopefully you can learn CHEAPER than I did... Steve

 

[dfkrug]

One STRONG caution about plumbing in AHEAD of the FEL valve - I did
this on my old Case (for a hydraulic sickle bar) and promptly SPLIT MY PUMP WIDE OPEN

The good news is that if the OP buys a multi-spool open-center (tandem-center) valve with PB
for this application, it will usually have its own relief valve built in. Not saying you can not find
a valve with no RV, but the usual sources for these valves (Prince, Brand, Cross, Energy, Danfoss,
Parker, etc.) will usually have a RV, often adjustable.

So, there is no problem with plumbing this valve upstream of the FEL valve, allowing for the
fact that its RV will be the first to open if it is set lower than downstream RVs.

It will be hard to get around all those hardline connections, so converting to hoses and fittings
may be the easiest way.

 

[RickB]

Return is probably NH terminology for PB used generally. So, the R line is to the next valve. So; Pipe R/PB to the new valve spool P/Power input, PB output back to the original R line, tee the new T/Tank outlet outlet into the existing T line at the manifold. That is what I see, I am no expert either but have studied up on this in preparation to do the same thing you are. Hope you are good with a tube bender and flare tool as new lines will be required.

Ron

Return is return. As in return to tank. It is most assuredly NOT the feed for the next valve. The only time this port/line has flow is when a downstream valve is stroked.

 

[RickB]

The good news is that if the OP buys a multi-spool open-center (tandem-center) valve with PB
for this application, it will usually have its own relief valve built in. Not saying you can not find
a valve with no RV, but the usual sources for these valves (Prince, Brand, Cross, Energy, Danfoss,
Parker, etc.) will usually have a RV, often adjustable.

So, there is no problem with plumbing this valve upstream of the FEL valve, allowing for the
fact that its RV will be the first to open if it is set lower than downstream RVs.

It will be hard to get around all those hardline connections, so converting to hoses and fittings
may be the easiest way.

Exactly.