Rudi wrote:The pic is definitely confusing. I will try tomorrow to get better shots..Rick Prentice wrote:Ok, now you have me totally confused. Looking at this new pic I have below,
just for starters, which letter do you consider the pressure line from the bypass block?
And, am I seeing things correct---- line A curves around behind the shifter knob and attaches at B ?
Rick, the pressure line is actually F which connects to the rear most top port via a 3/8 npt to jic male fitting, then a 90 deg jic female to male then the pressure line. G is the return to the reservoir. C comprises a 3/8 npt to jic female fitting, a jic to jic T fitting, then a 90 degree jic female to male, then to a female jic to 3/8 npt then to the male quick connect. A is the Return line from the valve which goes to to the T that connects to the front top port and A connects to that. The plumbing got a little confusing for me, but what I did was plumb it all loose then once it was in place, tightened it all up. There is not a lot of clearance between the fittiongs for the Pressure and the Return lines
Lines D and E go to the hydraulic cylinder in front for the blade.
I think I got that right ..
The port in the relief valve where your "B" fitting is attached, should be a through port. You should be able to look through the valve, in one side out the other. Hydraulic fluid flows through the relief valve unimpeded, but when the pressure goes above the setting on the valve it pushes the relief valve spring open and redirects (vents) the excess pressure out of the drain port and is carried back to the hydraulic reservoir.Ideally, that drain line should go back to the reservoir independently and not do double duty by being tee'd into your return line. Your pressure line "F" is correct and goes to the correct port.
I might suspect that the reason that your angle moves at twice the speed that is did previously is because you may have created a "regeneration circuit" and the flow from your return line (from the directional valve) is redirecting flow back through the relief valve cartridge and adding that flow to the flow from your pressure line "F" effectively doubling your flow back to the angle cylinder. Re-gen circuits are common in industrial applications (although done a little differently) to increase speed of an actuator with out increasing the volume of the pump. A re-gen circuit takes the fluid that is exhausted from the non energized side of a cylinder and redirects it back into the energized side of the cylinder. Normally the relief drain line is run independently to keep it from seeing back pressure which may effect its setting. With the low pressure and flow of the Cub hydraulic system, that may not be an issue.
Your tee where you are going to tap into your system to direct flow to your log splitter valve, should be between the relief valve and your power angle directional valve, just downstream of the relief valve. Or it could be installed where Rick drew the letter "B" by replacing that 90 degree JIC fitting with a tee and adding a QD in-line with your hose "F". The pressure should come from the by-pass block, through the relief and then it can be directed where ever you want it to go. You can tee into the pressure line prior to the relief providing that pressure is allowed to flow through the relief valve also. I don't want to confuse you but as long as the relief valve can sense the pressure in the line anywhere, it will open if pressure rises above the setting in the relief valve.
For your log splitter hydraulic supply you will want to have your QD's tee'd in the pressure and return lines. In your photo I see one QD in the shared drain/return line. If I understand correctly, you say that line "G" goes back to the reservoir. If that is true, it can't go to your log splitter. The drain/ return line has to always go back to the reservoir, if not you will dead head the system and something will fail (with luck, it would be the gasket again). I wish my printer / copier / scanner was working and I could draw you a diagram, but it is currently DOA.
I'm at work now and need to get busy here. I'll get back to you and try to add some more info as soon as I can.