My new L4060 HSTC pics!

[MtnViewRanch]

Curious if there a simple way for a person to determine how much their rear remote valve "leaks" even if they don't have top n tilt installed? Still wondering what is typical for Kubota rear valves.

Guess I'll find out for myself pretty soon if I have leaky rear remote valves with my OEM TnT which was in stock so I (reluctantly - I would have rather gone with Fit Rite but needed them too quickly) went with it.

Since I went with float valves for the TnT, my understanding is I could not have used a POCV cylinder anyway.

Maybe I'll get lucky or maybe I'll just get used to it. I'll give my report at some point.

You could (can) have still gone with the "T&T" set that has the DPOCVs, it's just that with the check valves you can not make use of the float function and there are several conditions where there is a benefit to having and using the float function with "T&T" . You will not know if your valves leak until either the dealer or you test them. I would be sure that the dealer is well aware of your concerns and should have him test with an implement BEFORE you take delivery.

Some leak, some don't, that's just the way that it seems to be. I sure would think that with this big of a purchase that your dealer would be sure that you had good units, especially since you show him that you are concerned.

Good luck.

 

[PSDStu]

Stu,

Thanks for the heads up on the leakdown.

Some other poster reported the same thing, but he did some other testing that had been suggested by MtnViewRanch. If I recall correctly, he disconnected the leaking side from the coupler and found some of the leaking was happening at the coupler or valve itself.

Hope I don't have that trouble, though. I know some is normal, but how far per hour would you estimate your side link moves?

edit: I looked again and that poster with the leak was you. Bummer. And if I understand correctly, you determined the culprit was the valve or coupler, not the OEM cylinder. Did you have the same leakdown rate when the tilt was plugged into your other rear remote?

My testing shows that my problem is with the OEM remote valve leak-by.....and that the remote leaks by more when I am operating the tractor then when it's just sitting there. I have discussed this with my dealer and he is aware of my issue, and is aware that many of the OEM remote valves leak by. My dealer will look at this issue for me, buta at this time I am not willing to have my tractor sitting at the dealer for the next week or two for them to try and fix a problem that Kubota may or maynot even agree is a problem.

All I know is that my side link drops down rather quickly when I am operating my tractor due to a leaky rear remote valve, and there is not a great deal I can do about it.

 

[BGigHarbor]

My testing shows that my problem is with the OEM remote valve leak-by.....and that the remote leaks by more when I am operating the tractor then when it's just sitting there. I have discussed this with my dealer and he is aware of my issue, and is aware that many of the OEM remote valves leak by. My dealer will look at this issue for me, buta at this time I am not willing to have my tractor sitting at the dealer for the next week or two for them to try and fix a problem that Kubota may or maynot even agree is a problem.

All I know is that my side link drops down rather quickly when I am operating my tractor due to a leaky rear remote valve, and there is not a great deal I can do about it.

And if both of your rear remote valves leak the same then I don't see a solution the dealer will help with. I am guessing they must or you would have said.

For now it looks like I am committed to seeing how the OEM TnT will work for me, but if I had to do it over again I would probably have gotten the top only (I expected to use this much more than tilt) and then determined how much my valves leaked. If much, then I would have gone with a dpocv tilt cylinder as I am pretty sure if the tilt was settling much on it's own it would really bother me when I was doing flat stuff for long periods.

But then I would be rendering useless the float ability of that valve, (and have given up the self cancelling ability in initial valve choice). So I'll give the regular cylinder a try.

It's no real biggie either way. Not the biggest problem in my life...

 

[PSDStu]

Yes, I had forgotten to mention that I tried swapping the remotes and it didn't seem to make much difference which one I used.

When I talked to my dealer about this the service manager told me that they had installed the following valve from Northern Tool for a customer who had the same side link problem that I have and it fixed the side link problem. He said he could install this valve if I wanted.

I'm not sure if I want to go that route...... I had wondered about how difficult it would be to install the check valve portion of the DPOCV into my side link......or just replace the side link with one with a DPOCV..... or just live with what I have now...... time will tell which way I go.

Metro Machine Lock Valve-4 Port, Model# 408-04 | Machine Selector Valves| Northern Tool + Equipment

 

[BGigHarbor]

Thanks for the info.

Sounding like Kubota rear valves leak, plain and simple. Although unless one is running TnT it doesn't matter.

Seems like anyone not needing float on their Kubotas tilt should seriously consider a dpocv on the tilt portion at least if they need their tilt to stay put for long periods between adjustments. Just depends on how they use it I think.

Cheaper than OEM too.

Probably a bit of denial going with some us that are dropping $40k+ on a tractor that Kubota would give us rear valves that leak down to the degree of both of yours. Surprising.

 

[MHarryE]

Thanks for the info.

Sounding like Kubota rear valves leak, plain and simple. Although unless one is running TnT it doesn't matter.

Seems like anyone not needing float on their Kubotas tilt should seriously consider a dpocv on the tilt portion at least if they need their tilt to stay put for long periods between adjustments. Just depends on how they use it I think.

Cheaper than OEM too.

Probably a bit of denial going with some us that are dropping $40k+ on a tractor that Kubota would give us rear valves that leak down to the degree of both of yours. Surprising.

Make that tractor hydraulic valves leak, not just Kubota valves. Just for curiosity I looked up the acceptable leak rate for Husco valves, Husco being one of the largest farm tractor valve suppliers in the world. Their valves typically used on larger more expensive tractors have a specified leak rate of 1.5 cubic centimeters per minute with 100 bar (about 1,500 psi) load on the valve. Google zero leak valves and you will find many suppliers. By the way I didn't pick Husco because they make bad valves - they are one of the best.

 

[BGigHarbor]

Make that tractor hydraulic valves leak, not just Kubota valves. Just for curiosity I looked up the acceptable leak rate for Husco valves, Husco being one of the largest farm tractor valve suppliers in the world. Their valves typically used on larger more expensive tractors have a specified leak rate of 1.5 cubic centimeters per minute with 100 bar (about 1,500 psi) load on the valve. Google zero leak valves and you will find many suppliers. By the way I didn't pick Husco because they make bad valves - they are one of the best.

That is the max leak spec on that valve, but I wonder what typical leak is. Less I am guessing.

I've seen other hydraulic valves that seem to hold pretty well, like certain FELs that I have seen thay can stay in position for days. So it's at least possible.

But like I said, in typical implement use a tiny bit of "leak" is of no consequence, just TnT esp tilt.

 

[MHarryE]

That is the max leak spec on that valve, but I wonder what typical leak is. Less I am guessing.

I've seen other hydraulic valves that seem to hold pretty well, like certain FELs that I have seen thay can stay in position for days. So it's at least possible.

But like I said, in typical implement use a tiny bit of "leak" is of no consequence, just TnT esp tilt.

Spool valves have clearance so you can move the spool. Clearance = leakage. Checks are used in zero leak valves, with various proprietary designs offering each supplier a claim to be better than the rest. I agree that you will find spool valves that don't leak - under low pressure. My loaders will hold position for how ever long I leave them up (I usually lower them to the ground for safety reasons) if the bucket is empty but with a bucket full of gravel they leak down.

 

[Baby Grand]

My newly installed remotes also cause TnT tilt cylinder leak-down.
Next time I use the tractor, I'll try plugging the tilt cylinder into the 3rd (non-float) valve outlets and see what effect that has.
I know that I'll lose float (duh) in that cylinder, but for brush hogging, who cares?
If the leak-down persists after the outlet swap, I'll start work on a quick disconnect check chain for the tilt side.
This would allow me to level the deck, old school, with the turnbuckle lift link that I moved to the left side when I installed the tilt cylinder.

 

[BGigHarbor]

How much would you guess your tilt settles in terms of distance/time?