Why not check valves in FEL?

[radman1]

When it comes right down to it, does it really matter that our hydraulics leak some? Not really in my opinion, when working our tractors we are constantly using-adjusting our loaders, 3pt hitches, top links and side links. So what if they leak down some every few minutes, I know that I am adjusting them continually. And is it that big of a deal to pull on the loader control for a couple of seconds every 10-15 minutes while working with a rear implement? I guess that is one of the reasons that I am not a proponent of the DPOCV's. If your working a box blade, your constantly making adjustments. I do anyway, makes no difference if my hydraulic bleeds off some because I am changing the adjustment anyway.

Just my experience with my conditions with what I do, others will vary.

Depends on the task. Sometimes I am lifting something and I need it held at a specific height to work on a project. Creeping down a few inches in several minutes is aggravating when I am by myself. I believe most leak down is from the valves and not the cylinders. Some of my ag tractors have nearly 0 leak down on heavy implements using a inexpensive farm grade cylinder. A DPOCV is not that expensive, especially at the price a manufacturer would pay for large quanitities. The hydraulic top links on my ag tractors need to be stable. Several thousand pounds of weight on the 3 pt. I cannot have varying depths when cultivating, ditching ect because my top link moved an inch.
I have an 8' manlift I use on my FEL. Tipping down a few inches results in large shifts in manlift. My JD CUT does not hold near as well as my Bobcat Toolcat. My TC can hold 1000 lbs for 4-5 hours and drift down a couple of inches. My CUT would drift several feet in the same time.

 

[picker77]

Re the Dual Rear SCV valve pictured below from the JD Parts Catalog (that's I hope being installed even as we speak)--Is the plug I circled in red the power beyond output port on this valve? Or is there even a PB port on this valve? Where does the return side of the PB hose set go--directly to the tank? Trying to get myself educated on future PB possibilities after these new rear remotes are installed.
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Did you guys forget about this part of my original question? I ask all this because I was thinking that with two control valves now, maybe I'll have a choice where to tap in for PB: the original joystick loader valve, or this new one in the back. Knowing the answer could make a big difference in how I can conveniently place connectors, route hoses, etc. if I decide to install power beyond later.

If nobody knows for sure, that's ok. When I pick up the tractor I plan to take this diagram with me and ask the hydraulics wiz at the dealer the same question.

Clearly I need to do more homework on power beyond, a subject which is pretty much ignored in JD's manuals.

 

[MtnViewRanch]

Depends on the task. Sometimes I am lifting something and I need it held at a specific height to work on a project. Creeping down a few inches in several minutes is aggravating when I am by myself. I believe most leak down is from the valves and not the cylinders. Some of my ag tractors have nearly 0 leak down on heavy implements using a inexpensive farm grade cylinder. A DPOCV is not that expensive, especially at the price a manufacturer would pay for large quanitities. The hydraulic top links on my ag tractors need to be stable. Several thousand pounds of weight on the 3 pt. I cannot have varying depths when cultivating, ditching ect because my top link moved an inch.
I have an 8' manlift I use on my FEL. Tipping down a few inches results in large shifts in manlift. My JD CUT does not hold near as well as my Bobcat Toolcat. My TC can hold 1000 lbs for 4-5 hours and drift down a couple of inches. My CUT would drift several feet in the same time.

While everything that you have said is true, I don't think that the average TBN person does or has what you do. (you are not the average TBN person IMO). I agree that the valves and not the cylinders are usually the leak down problem. We have a 580 Case TLB and I have left the loader raised up all the way for well over a month before and had ZERO leak down.:thumbsup: My little Mahindra 3215 holds pretty good,(hood height for hours) but my Mahindra 7520 holds no where as good (hood height to ground in 30-45 minutes). But for my uses, all this leaking has not caused me any problems to be concerned with.

 

[radman1]

(you are not the average TBN person IMO).

Do you mean above or below average? lol:laughing:

 

[picker77]

I picked up the tractor this afternoon, looks like the dealer did a nice job of installing all the hardlines and stuff, the whole thing looks really good and he claims it tested fine, although I haven't tried it out since I don't have my top and tilt yet. I like the mount JD provides in the kit, handy but out of the way of my elbow, and the wrist rest is a nice feature. The left hand set has float, the other does not. FWIW, the kit was $720 and arrived only three days after I ordered it, and the install was about 3 hours of actual shop time.

The mechanic who did the install verified that the plug I had circled in red was in fact the PB port for this valve. It's right out there easy to get to if I want to use it in the future.

 

[MtnViewRanch]

Do you mean above or below average? lol:laughing:

Hadn't given it any thought,:confused2: just that you are not what I consider the typical TBN member. I have a question for you though, so you use a hydraulic top link when you use your farming implements? I would have thought that you would have just had a manual adjust top link since adjustment is done once when the implement is hooked up, or does it not work that way? :confused3: Me, I pretty much only use grading implements and am constantly adjusting them to work with our terrain.

 

[kennyd]

I picked up the tractor this afternoon, looks like the dealer did a nice job of installing all the hardlines and stuff, the whole thing looks really good and he claims it tested fine, although I haven't tried it out since I don't have my top and tilt yet. I like the mount JD provides in the kit, handy but out of the way of my elbow, and the wrist rest is a nice feature. The left hand set has float, the other does not. FWIW, the kit was $720 and arrived only three days after I ordered it, and the install was about 3 hours of actual shop time.

The mechanic who did the install verified that the plug I had circled in red was in fact the PB port for this valve. It's right out there easy to get to if I want to use it in the future.

Looks great Picker...That is the first one I have seen of these.

Are there 2 or 3 lines going to the tranny?

 

[picker77]

Looks great Picker...That is the first one I have seen of these.

Are there 2 or 3 lines going to the tranny?

There are three lines. I probably should have posted these photos elsewhere, this doesn't exactly fit in with my original "check valves in FEL's" thread. Sorry.

 

[wdchyd]

Nice Looking Job Picker.....:thumbsup:

 

[radman1]

Hadn't given it any thought,:confused2: just that you are not what I consider the typical TBN member. I have a question for you though, so you use a hydraulic top link when you use your farming implements? I would have thought that you would have just had a manual adjust top link since adjustment is done once when the implement is hooked up, or does it not work that way? :confused3: Me, I pretty much only use grading implements and am constantly adjusting them to work with our terrain.

Hydraulic top link makes hooking the quick hitches much easier. Otherwise it is climbing down 3 steps, climbing on top of the attachment, changing the manual 3rd link, climb off attachment ect. With heavy attachments, of several thound pounds, a manual 3rd link doesn't turn very far before I run out of muscle. Also don't know the setting of the top link until get to field. Change the top link as I start in the fields. Usually, once it is set, it tends to stay there. Can make some adjustments as field condtions change.

Like you, with box blade or smaller grading attachments, I change them constantly as I use on attachment on the CUTS.