Hydraulic valve: Which one?

[MicroRacer]

Need a 3 spool valve for my mahindra 2555. 2 of the spools will be used for a T&T and the 3rd will be a second remote hook up. I would like to have 1 of the spools be able to float to use on my tilt cylinder. I looked around for a while and just wound up really confused so I thought I would ask for some advice and see what you guys would recommend for this setup.
Thanks

 

[MtnViewRanch]

I recommend you get these. Very good valves and you can get what you need. I highly recommend that you get both of your T&T valves with the float feature. Then the 3rd just a spring return to center valve for most implement cylinders.

If you want, I can set you up with the valves and couplers.

 

[dwalk19]

I recommend you get these. Very good valves and you can get what you need. I highly recommend that you get both of your T&T valves with the float feature. Then the 3rd just a spring return to center valve for most implement cylinders.

If you want, I can set you up with the valves and couplers.

I to am looking to add rear remotes to my tractor a mahindra 2538, just would like 2 spool for a top and tilt kit though,
What would be a good valve for that and I was thinking possibly a joystick valve because they seem to have a smaller valve body, and also where is the connection block from in the picture, it looks nice and clean and ready to bolt on, thanks

 

[MtnViewRanch]

I to am looking to add rear remotes to my tractor a mahindra 2538, just would like 2 spool for a top and tilt kit though,
What would be a good valve for that and I was thinking possibly a joystick valve because they seem to have a smaller valve body, and also where is the connection block from in the picture, it looks nice and clean and ready to bolt on, thanks

The joystick control adds quite a bit to a set of stacking valves, actually to any valve. Plus it can complicate with how the valve gets mounted.

On the pictured valve, the inlet is on the left with a 90 & a 45 pointed to the right. The return to tank port has a 90 pointed to the right and the power beyond is at the center on the right side with the 90 & 45 on it.

 

[goeduck]

On the pictured valve, the inlet is on the left with a 90 & a 45 pointed to the right. The return to tank port has a 90 pointed to the right and the power beyond is at the center on the right side with the 90 & 45 on it.

This begs a question. I had in the past when inserting a valve in the power beyond circuit, I always ran a separate hose to a T in the existing tank hose. So the hoses on the inserted valve were:

In from last power beyond
Out on PBY to In on next valve
To Tank
(2) Cylinders Work Ports

Then I was looking at my backhoe and there are only two hoses. One from FEL power beyond and one returning to the tractor. No third hose.

When do I need a 3rd (Tank) hose? Does the last valve not need one because everything goes to tank at that point?

 

[MtnViewRanch]

This begs a question. I had in the past when inserting a valve in the power beyond circuit, I always ran a separate hose to a T in the existing tank hose. So the hoses on the inserted valve were:

In from last power beyond
Out on PBY to In on next valve
To Tank
(2) Cylinders Work Ports

Then I was looking at my backhoe and there are only two hoses. One from FEL power beyond and one returning to the tractor. No third hose.

When do I need a 3rd (Tank) hose? Does the last valve not need one because everything goes to tank at that point?

Correct, the last valve dumps all fluid back to the tank.

 

[Oldoak]

OK, now I have a question while on this hydraulic valve discussion with knowledgeable people.

I am looking at ordering a new CUT with two rear remote valves. One to control the angle of a back blade and another remote valve, just incase I would find a need for it in the future.

Would a "return to center valve" be good for angling the back blade?

I was thinking of ordering (1) "return to center" and (1) with a "float" position. Would this be a wise choice? I will not be going with a top & tilt configuration.

 

[LouNY]

I have 3 remotes on the rear of my tractor, 2 are spring centered and 1 is detented, none of them have a float position and I have missed that function several times.
If I could have gotten a float I would have. I like float for floating on two way cylinders and its really nice to have on single acting cylinders which many implements have.
I like detent valves for anything that's has it's own control such as a wood splitter or a hydraulic motor such as grain or fertilizer carts.
A spring to center would be a good valve for angling a blade, also its hard to have to many remotes.
enjoy

 

[LouNY]

OK, now I have a question while on this hydraulic valve discussion with knowledgeable people.

I am looking at ordering a new CUT with two rear remote valves. One to control the angle of a back blade and another remote valve, just incase I would find a need for it in the future.

Would a "return to center valve" be good for angling the back blade?

I was thinking of ordering (1) "return to center" and (1) with a "float" position. Would this be a wise choice? I will not be going with a top & tilt configuration.

I don't know the size tractor or blade you are considering but you could be short changing yourself with just 2 remotes, many blades that have a hydraulic angle could also have hydraulic tilt and hydraulic offset then add a hydraulic top link and you are up to 4 remotes.
Luck

 

[MtnViewRanch]

OK, now I have a question while on this hydraulic valve discussion with knowledgeable people.

I am looking at ordering a new CUT with two rear remote valves. One to control the angle of a back blade and another remote valve, just incase I would find a need for it in the future.

Would a "return to center valve" be good for angling the back blade?

I was thinking of ordering (1) "return to center" and (1) with a "float" position. Would this be a wise choice? I will not be going with a top & tilt configuration.

A float feature valve works just like a spring return to center valve. (let go of the lever and valve springs back into the closed position) It just has that 4th detent position which has the float mode feature.

 

[Oldoak]

Thanks guys, that clears things up a bit.

 

[goeduck]

Correct, the last valve dumps all fluid back to the tank.

If you insert a valve and do not pipe a tank line, just in and power beyond, what happens? Does it not work? Seems the fluid when the new valve is not in use would still go to the power beyond and the next valve would have all the pressure. Just checking to see if I can save a few fittings on the tank line.

 

[bigdeano]

If you insert a valve and do not pipe a tank line, just in and power beyond, what happens? Does it not work? Seems the fluid when the new valve is not in use would still go to the power beyond and the next valve would have all the pressure. Just checking to see if I can save a few fittings on the tank line.

It will work until you operate the new valve to move a cylinder etc, then the oil that's supposed to go to the tank has nowhere to go, and the cylinder won't move.

 

[goeduck]

It will work until you operate the new valve to move a cylinder etc, then the oil that's supposed to go to the tank has nowhere to go, and the cylinder won't move.

How come the last valve can do it without a tank line? :confused3: or is the last valve not considered power beyond or not piped power beyond?

 

[farm boy00]

How come the last valve can do it without a tank line? :confused3: or is the last valve not considered power beyond or not piped power beyond?

The last valve in a series does not need a power beyond port because it is the last one, hence not needing to feed power beyond that point. So all it needs is a line In (feed) and line out (return to tank)

 

[CincyFlyer]

Note that on the Mahindra 25 series (and other Mahindra/TYM/Mitusbishi tractors) the backhoe has only one in, and one out; the out, which is a Power Beyond, goes to the 3-point lift. So it doesn't need a drain, even though it's not last in line! The backhoe is frame mounted, so the 3-point will never be used when it's attached. The two hoses on the tractor are simply attached together when the backhoe is removed.
That being said, as I have a similar tractor, I replaced the FEL valve with a new unit having a joystick (with the proper float) and a third valve for a grapple or tree grabber. I'm attaching the old FEL joystick to the back of the tractor to operate Top'n'Tilt or other gadgets.

 

[goeduck]

Note that on the Mahindra 25 series (and other Mahindra/TYM/Mitusbishi tractors) the backhoe has only one in, and one out; the out, which is a Power Beyond, goes to the 3-point lift. So it doesn't need a drain, even though it's not last in line! The backhoe is frame mounted, so the 3-point will never be used when it's attached. The two hoses on the tractor are simply attached together when the backhoe is removed.

Are your 3 point arms active when the backhoe is attached? Most are not. If they are than I am back to being confused. What farm boy00 and bigdeano said is what I have always heard and done (never made sense but is what I have always heard).

On my B21 I have to switch a valve besides loop the backhoe hose back to the tractor. On my Bradco 611 I have to switch power beyond from the backhoe to the 3 point. On both the 3 point is not active with the backhoe active.

I may need to pull apart a spool and see how the fluid porting differs between power beyond and tank. :muttering: :muttering:

 

[bigdeano]

On a valve which has both power beyond and tank ports, the oil returning to a work port is directed to the TANK port, not the PB port. When the valve is centered, the oil from the IN port goes to the PB port instead of the TANK port, so the next valve can use it. It's actually quite simple, no need to take a valve apart.

 

[CincyFlyer]

Are your 3 point arms active when the backhoe is attached? Most are not. If they are than I am back to being confused. What farm boy00 and bigdeano said is what I have always heard and done (never made sense but is what I have always heard).

On my B21 I have to switch a valve besides loop the backhoe hose back to the tractor. On my Bradco 611 I have to switch power beyond from the backhoe to the 3 point. On both the 3 point is not active with the backhoe active.

I may need to pull apart a spool and see how the fluid porting differs between power beyond and tank. :muttering: :muttering:

It will certainly work: that oil going through the valve is essentially going through a straight pipe if a valve isn't actuated! The only difference is that it's dumping waste into the PB line, which would fail to work if,
and only if, the 3-pt lift was engaged when trying to use the backhoe. No need for that, it's a subframe-mounted BH, so no worries.
Theoretically, if you would only operate one valve at a time, you can stack PB valves with no drains. It's a really bad idea, because you could "backwash" some pressure and cause unintended and potentially dangerous consequences, so it's rarely done, beyond the instance I've described.

 

[goeduck]

Good descriptions. Thanks