http://www.hydraulic-vlv.com/files/mf/products/45_file.pdf
http://www.hydraulic-vlv.com/files/mf/products/26_file.pdf
I think it is one of these. Unfortunately, the model number seems like rubbed off from the nameplate. The stamped letters on it specify the different options.
From the last page of the second datasheet above, there is a description of which type of plugs result in which kind of power beyond or closed center.
Tomorrow I'll take another, closer look at the plugs, and unscrew it from where it is mounted in case there is any more information stamped on the bottom.
There are instructions for two different models of valves in the two pdf files.
Directional Control Valve ZC 70
Directional Control Vale PC 100
From the literature it is clear the tank port is designed to less than 50 Bar pressure where the rest of the valve ports are at least 250 Bar.
So feeding another circuit from the tank port is unacceptable. see red box on photo which is a caution and the two green boxes showing the much higher pressures that are acceptable
Your valve has 4 spools with two work ports each for a total of 8 ports + 1 in from the pump and 1 out to the tank. That makes 10 in total.
If it had power beyond, there would be 1 additional port and hose. Each valve with the power beyond (also called high pressure carry over in Europe) feature needs its own tank port going directly to the tank.
Before I saw what you were calling a FEL valve I asked if it had 6 or 7 hoses. One extra would mean power beyond. With your 4 spool valve, 11 hoses would indicate power beyond.
Try and see if you can make out a ZC 70 or TC 100 on the valve label so we can focus on the correct one.
In the next photo I have a yellow arrow pointing at a plug in the side of the valve. I am thinking this is what you remove to screw in the HPCO or PB plug to acquire an additional line to supply another hydraulic circuit.
In the next photo, look very closely at the plug I have a black arrow pointed to.
This plug has threads in a hole on the end and this is where the pb hose would connect in the same fashion and with the same type of fitting as all the work port hoses have where an adapter screws into the valve body and then a hose to the adapter..
In my mind the adapter screwed into the power beyond plug gives you the additional port for power beyond.
I need to caution you that I am not a hydraulics expert like JJ who has been a member of this forum for a long time but rarely posts because of personal commitments.
Hopefully with the combined wisdom of others on the forum we can get your tractor into a satisfactory state.
Unscrew the cap with the yellow arrow when the tractor is off and see if you can envision the power beyond plug scewing into the hole and the two O rings on the power beyond plug seating on two different internal surfaces.
Don't go rushing into things until we have it sorted out as it would be tragic to break something.
I do think you could order the power beyond plug and adapter to screw into it to accept a hose. They are not expensive and I think you will find you need them.
Dave
M7040
