J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
The manual even states the relief settings. 2630 psi to 2770 psi.
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L**40 rear hydaulic pressure
- Thread starter kuboman
- Start date
- Views: 24082
Are ya all confused yet:laughing:
The safety valve is for the 3pt in case of a shock load or sudden over load and it has nothing to do with anything but the 3pt. The loader valve has the only relief.
The rear remote I added is a factory remote, exact to the last bolt and washer to what they use at the factory and it gets its oil from a port on the top of the main tractor case by the 3pt. Pressure and return ports are side by side. It is a very easy installation.
As I have said before the only way to get higher than relief oil is for there to be a small percentage of oil by-passing the relief and going to the PB port.:confused2:
The safety valve is for the 3pt in case of a shock load or sudden over load and it has nothing to do with anything but the 3pt. The loader valve has the only relief.
The rear remote I added is a factory remote, exact to the last bolt and washer to what they use at the factory and it gets its oil from a port on the top of the main tractor case by the 3pt. Pressure and return ports are side by side. It is a very easy installation.
As I have said before the only way to get higher than relief oil is for there to be a small percentage of oil by-passing the relief and going to the PB port.:confused2:
Chilly807
Elite Member
If that's the case, then increasing the size of the hose and fittings from the loader valve tank connection to sump should fix the problem. Only a restriction on the return side will force pressure higher than a relief setting.
Sean
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
You have already stated the FEL relief is working correctly, and it is the first relief valve in the hyd system and therefore, the relief is regulating the pressure and bleeding off the any excess above the set relief pressure to the tank hose/line.
The first relief set pressure is what the rest of the hyd valve system will see.
We know about the safety pressure and what it is for, but that is the only mentioned of any pressure above about 2770 psi.
Rules are rules, and we must abide by them.
The first relief set pressure is what the rest of the hyd valve system will see.
We know about the safety pressure and what it is for, but that is the only mentioned of any pressure above about 2770 psi.
Rules are rules, and we must abide by them.
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Except the loader reliefs is properly so it can't be that.
oldnslo
Super Member
http://img.photobucket.com/albums/v238/4shorts/scans/SCAN0012.jpg
In looking at this schematic of the loader valve it does explain how you get oil down stream to do another function.
Spool #2 or the "Boom Control" takes any oil coming back from the "A" or "B" port and directs it into the PB line. This feature is meant for raising and dumping simultaneously or lower and curl. You could also in theory raise or lower the loader and use the 3PH.
Spool #1 or the "Bucket control does not have this feature.
Based on the schematics and descriptions provided by 4shorts, the FEL relief should control pressure to all of the functions so now we are back to what is not right.
Kubo, how far away is the dealership where you looked at the other tractor and did the pressure tests? Are ALL of the lines from the FEL to the rear valves visible? If yes is there a chance you could physically compare every connection to confirm a line is not connected incorrectly.
Roy
In looking at this schematic of the loader valve it does explain how you get oil down stream to do another function.
Spool #2 or the "Boom Control" takes any oil coming back from the "A" or "B" port and directs it into the PB line. This feature is meant for raising and dumping simultaneously or lower and curl. You could also in theory raise or lower the loader and use the 3PH.
Spool #1 or the "Bucket control does not have this feature.
Based on the schematics and descriptions provided by 4shorts, the FEL relief should control pressure to all of the functions so now we are back to what is not right.
Kubo, how far away is the dealership where you looked at the other tractor and did the pressure tests? Are ALL of the lines from the FEL to the rear valves visible? If yes is there a chance you could physically compare every connection to confirm a line is not connected incorrectly.
Roy
4shorts
Elite Member
Your welcome but J-J is the one who sent me a PM about it. I haven't been following things so closely due to the holidays. My gauge set is out on loan because we have our shop down for another week other than that I could have done some checks on my end for you. If you need anything else out of the manuals let me know. I have them here in he office.
The dealer is a 40 min drive, I hope to get there the next day or two. Yes all lines are visible. It seems strange that steel lines could be connected wrong, unless they made a whole run a machines with the wrong lines in which case I will have company.
Thanks again and if I don't have this solved in the next week I will ask for your assistance. Unless of course I am committed to the looney bin:laughing: