There are a couple of methods used in the mobile hydraulic market to control multiple actuators from a common pump supply. The most simple is the monoblock valve, which typically has a cast iron housing and a machined spool operated by a spring centered lever, although solenoid operation is available for nearly every brand of valves. The monoblock valve is available up to at least eight spools, each able to operate a function of their own.
The most basic of these valves have no auxiliary valves except a relief common to the pressure ports of every spool. Although rare, monoblock valves can be optioned with components in the inlet or work ports of the valve, such as pressure compensators or work-port relief or counterbalance valves.How to Install Third Function Valve on Kubota Tractor
If you are a mobile OEM using hundreds or thousands of the same configurations, a monoblock valve is the simplest direction to take. If you have a more demanding circuit—or if you manufacture machines each with unique build requirements—sectional valves could be the product for you. Sectional valves, unlike stack valves, are slices of individually packed spools held together horizontally with tie rods, and include both inlet and outlet sections. If you require just one spool section, you still need one inlet section and one outlet section, on top of the tie rod kit.
Kubota L4310 HST 4X4 WITH LA682 LOADER HYDRAULIC PROBLEMS
Sectional valves can be highly optioned with relief valves, pressure compensators, load sensing functions, work port auxiliary valves etc. A large OEM can stock dozens of individual components, and not unlike modular stack valves, create complex circuits on the spot. There are almost no mobile machines without some valving located outside the centralized bank closer to the actuators, but this method gives you a lot of options to minimize that.
A power beyond valve has three internal flow cores: The pressure core, the tank core and the through-center or power beyond core. If unused, the tank and through cores are open to a common port, and flow goes back to tank as it would in a tandem centered valve. However, when the power beyond adaptor is installed, the through center core is separate from the tank core.
The tank port of the first valve still needs to go directly back to tank, but the power beyond can now feed into the pressure port of the next, downstream valve. The advantage to power beyond is in allowing you to hook up optional sub-circuits to a standard configuration, like adding a log-lift function to a log splitter.
The downsides are the extra plumbing, which lead to leaks, and also an annoying effect related to the first valve in the chain tending to steal flow for its operations. Because the first valve has its own tank line, every function used by that valve diverts flow away from power beyond and straight back to tank.
On my Woods backhoe, the Bucher stack valve has the pressure inlet line on one side and the return to tank line outlet on the other side. In that outlet section it has a Power Beyond plug that can be utilized if one wants. So what I see is, with all valves in neutral, the flow is circulating. The question is, could I just run the return line right into the inlet of the auxiliary valve and the outlet from there back to the tank? Through center just means the valve bypasses the spool in neutral, but the spool could be open center, motor spool, closed center etc.
Regardless, if your auxiliary valve is a mobile-type through-center valve, it will work just fine after your Bucher valve. Just remember that the first valve gets flow priority.Log in or Sign up. When diagnosing an issue, or showing off your tractor or implement, it's important to add images so we all know what you're talking about. Especially when it comes to issues and repairs it's important to include as many images as possible to help our members diagnose your issue.
To upload images, use the Upload a FIle button found towards the bottom right of the post response box or a new thread. Dec 6, 1. Ok, I am looking for some enlightenment on this subject. I know there is a difference between SCVs and a power beyond kit. I think from the way I read it, the SCVs allow for two-way control of an implement i. The power beyond provides a relatively constant flow in one direction to the implement on which the control valves are located i.
Please correct me if I am incorrect on my assumptions. We all know that when we assume it makes an "ass" out of "u" and "me. Am I correct in assuming these would need to be open-center valves?
Power beyond kit
Please feel free to correct, comment on, or critique my post. I am checking the feasibility of purchasing a backhoe attachment for my JD. Dec 6, 2. You pretty much have it down correctly if I am understanding you correctly. You would definitely need the power beyond kit for a back hoe or you can opt to go with a back hoe which has its own hydraulic oil supply and pump which runs off of your rear pto. Deere sells kits for all of this but they will cost you a few bucks.
If you would like; I can look up or you can too the part 's for these kits on the jdparts. Live OakDec 6, Dec 6, 3. I was looking at purchasing a backhoe attachment, now I found some plans that I kind of like so I am thinking of building one well ok, having one built for about a quarter of the price.
At their estimated price, I could pay for it with one job. I was pricing PTO pumps, tanks, filters, etc. I can't remember what the JD dealer said the kit costs, but he did say a backhoe would have the same digging power but run a little slower with the power beyond over the PTO pump because the pressure would be the same but flow wouldn't be as high as with the PTO. Does this make sense? Not a whole lot slower, he said some people used to a large TLB might notice the difference and unfortunately that is what I am used to using.
If I have the backhoe on the tractor, I obviously couldn't or wouldn't have need to operate another rear SCV. When the backhoe is removed could I run hoses from the power beyond to some control valves mounted on the tractor so I would then have a rear SCV?
I was thinking maybe in terms of a dump trailer. I can't see any difference between using a power beyond to operate a log splitter with a valve located on the splitter which controls a hydraulic cylinder and using the power beyond to power a valve mounted on the tractor to dump a trailer or move a hydraulic top link oooh, that would be nice.
Is there a difference in the pressure and flow between and SCV and the power beyond? I was trying to avoid purchasing both a power beyond and rear SCV kit for a tractor as I don't see needing them both at the same time. I figure if I have to hook and unhook a couple of hoses it isn't the end of the world when I look at how much the kits are. Plus, the more money I spend now, the longer before I can get a newer, nicer tractor.
Dec 6, 4. The power beyond bypasses your lift arms when you have the hoe hooked up. I have remotes mounted on my to run the stump grinder.Situation or Problem Need more explanation on what Power Beyond is used for. For example, planter vacuum motors, spray pumps, lift cylinders. Use Power-Beyond when:.
An SCV section has an internal component referred to as a pressure compensator valve. The pressure compensator valve acts as a pressure regulator in the SCV section to maintain constant flow regardless of any other hydraulic function used. For example, a hydraulic motor running on SCV 1 may require 10 gallons per minute of hydraulic flow at psi.
If SCV 2 is engaged to run another hydraulic function that requires 6 gallons per minute at psi, the compensator in SCV 1 will balance this pressure change from hydraulic pump and maintain steady operation of the hydraulic function from SCV 1. John Deere. What is Power Beyond? Explanation of the Power Beyond hydraulic system. Implement control valve requires external load sense signal to prevent pump operation at high pressure. All Rights Reserved. No other SCV outlet is available. Did this tip answer your question?
Fully answered question Partially answered question Did not answer question Answer does not apply to my question. This feedback will be used to improve the overall quality of our tip and troubleshooting offerings.Discussion in ' Skid Steers ' started by jamiegoffApr 1, Log in or Sign up. Heavy Equipment Forums. Thank you for visiting HeavyEquipmentForums.
Kubota: KIT POWER BEYOND, Part # 77700-06110
Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy.
Thank you! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges.
Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!! Welcome to HeavyEquipmentForums. Hydraulic problems Discussion in ' Skid Steers ' started by jamiegoffApr 1, Joined: Dec 16, Messages: 20 Location: michigan. Hey guys, I eliminated the High-flow hydraulic system off my c.
I removed a hydraulic hose that ran from the foot control to the High flow system. I capped the fitting on the foot pedal valve. I am not sure if it is just coincidence or not, but when I put it back together the hyd. The loader arms will not go down unless you feather the tilt back and forth.
So I took the valve out, tore it all apart, and made sure that it was returning to the neutral position. I reinstalled it and it made no difference. I bypassed the valve, and everything works as normal. Any suggestions? Joined: Jan 15, Messages: Location: pennsylvania. You would really need to keep that open center flow circuit free to flow back to tank, I had one of my customers call me this winter with exactly what you described going on.
One of his operators bumped the hi flo switch on inadvertantly and the machine hydraulics locked up as you described. Are the high flow hyds giving you trouble? My experience is that even if the system has problems that keep it from engaging you would never know it's there.
You could remove the elbow towards the engine off the loader control valve and get a plug from Case but you will then disable aux as well.Click to Post a New Message! Post: Here it is: a "hydraulic adapter cover". It installs on the left side of transmission on hydraulic control valve using 2 bolts which now hold a cover plate there. Behind the plate on trans. This adapter seems to be nothing more than a metal block having right-angle threaded holes for hyd.
Dealers advise it comes with attachments such as FEL or dirt blades. Any ideas? I think I could make one myself. Honered to be included in disscussion group. Kubota BX Hydraulics question I think this is the part number you're looking for.
Of course there are other parts you'll need, like O-rings and bolts. I've ordered parts from this site in the past. Kubota BX Hydraulics question You can also download a comprehensive parts list here.
It's a great resource for part numbers and assembly diagrams. Do a search in the LA loader PDF document for the part number in my previous post and you should be able to find assembly diagrams and associated part numbers. Posts: Could you give me the link for this model's PDF document, please? Kubota BX Hydraulics question What you are looking for is the hydraulic block adapter.
The adapter allows external circuits to be added to the tractor hydraulics. Make sure you have a good diagram and an uderstanding of the hydraulic circuit you are going to add. The two holes on the adapter plate are for "power beyond" and "return".
You need to make sure the circuit you add also has "power beyond" to run back to the return port on the block, and "exhaust" back to the reservoir. This will assure your pressure loop is complete in the tractor. A good diagram is included in the FEL owners manual. Your blade hydraulics will be very similar to the FEL. I operate my blade with the FEL valve.
At the top of the next page click where it says "click here" to have parts info sent via email. Select B-series again, fill out the form and submit. The link will be sent to your email address of choice.
It's a bit of a pain, but it works. PDF" with no luck. Hope this helps. Kubota BX Hydraulics question The parts that you are looking for normally are under the attachments not the tractor.
So find the compatable attahments and your local dealer's parts department will be able to help you more.Allows the use of a 3rd function such as a grapple or 4 in 1 bucket. This kit is for tractors that use less than 15 GPM, larger tractors will require the upgraded option. Call for more details you must have your tractor model and loader model numbers when ordering.
The 3rd function kit connects to the power beyond port of your existing loader valve. The hand grip with three position rocker switch is designed to fit over you loader joy stick and be screwed on. NOTE: If your tractor comes with a backhoe as standard equipment like the Kubota L39, then the hose lengths will be correct. If you have a backhoe that is an option or later added on, then the hose length, hose end and valve mount may not be correct since the valve kit is designed for the loader when there is no backhoe present.
Hi, I'm Ted from Everything Attachments, and we're here today to show you what a third function auxiliary hydraulic is for your tractor. With so many attachments now coming with a hydraulic function on them, like a grapple bucket, so many different features that can go on the front of these, whether it be a hydraulic auger, grapple bucket, scrap grapple, root grapples, everything that has a cylinder on it is going to require two hydraulic connections.
And, there is such a thing as a diverter valve. I'm not a big fan of that, so what I like is a true third function. We used to weld a bracket on the front here and make the lines rigid, and you can still do that. I've kind of gotten used to where I like my lines to be flexible, where the lines from your attachment can come in from the side instead of pinching up your hoses here short.
These are standard, what I call a round-style ball coupler. This is what would normally be on a skid steer, would be a flat-faced coupler.
To Infinity and power beyond
So, these are adapters I've made so I can use it for anything. So, you can see the different kind of adapters that are available. So, what this is, this is going to power the cylinders on your attachment that's on the front. And, the best way to do it, this is going to be what does the work, and I'm going to explain that in a minute.
And, I want you to think about why you want to do it this way instead of a different way. If you're using, say, a root grapple, what you would like to do is to be able to crimp your root grapple and lower it or change the angle of it at the same time.
And, you can only do that with a third function auxiliary.I have had hydraulic problems 3 or 4 times before the warranty ran out. Since the warranty ran out 1 YR. The boom leaked off first, the dealer then replaced the remote joy stick valve block, I then started having problems with the boom lift and lower, the bucket tilt up and dump works fine and will pick up the front end of the tractor with not problem, I had to, since the warranty will not be honored by kubota remove the valve block and had it checked out by a local hydraulic repair shop.
They found nothing wrong, the problem is that the boom will not lower without putting it the detent or float position. The boom will not pick up the front end and it will not raise without feathering the raise position lever slightly, and it will then raise slowly. It acts like something is restricting the flow to and from the lift cylinders, or there is a problem in the cylinder s. I am now prepared to take the cylinders off next. Any suggestions out there? I hope I worded this so that it can be understood.
Thanks jpero It certainly sounds like back pressure restriction in the power beyond circuit. We have experienced this on certain units when the hydraulic lift arm circuit is energised or on relief.
This causes the backpressure. The valve still works partially because of the regenerative style of circuit used. If your 3 point lever stop is somehow bent or out of adjustment this is a possible cause because beyond normal full raised position you can get into a "relief" situation. Other possible causes : First, make sure that all quick couplers from loader to tractor are working properly. Second, make sure valve on tractor hydraulic block is turned to proper position with loader installed it's the crewdriver slot between the pressure and power beyond ports.
Third, make sure that the "seat adjustment knob", actually the hydraulic drop rate valve is fully open.
I have also removed the lift cylinders and taken them to the hyd. No report yet. I haven't done this but I thought I would purge air through the hyd. One thing happened to me awhile back, I was working the loader and pushing over some brush, I got into a pretty good load against the tractor, the motor stalled but didn't stop running, when this happened it started making a noise, sounded like the lifters were knocking or something.
It lost all power but the motor still was running, it would not do anything hydraulically.