With engine stopped, press both manual actuator “pins” at the ends of proportional valve in about 3 mm. Then start engine and oil flow to your handpump/orbitrol. But at the same time, oil will move the slider inside proportional valve and press one of the proportional valve ends/pins out. (I don’t remember if both came out, but only one could easily be pressed in again by hand)
Ok and then do I need an LS, or an open valve?
I think I understand the first part of the test: we are checking to see if there is flow from the proportional solenoid to prove whether or not the compensator is moving to give flow to the proportional valve when demanded, correct?
I am a bit unclear about the “overflow valve” test. Are you referring to the pressure relief? The “SR1A-A2…” valve? Are you saying that we need to diagnose that one as well?
If so, I was thinking similarly. Perhaps that valve could be stuck open, and dumping load sense pressure to tank.
Is there a port where load sense pressure can be measured during operation?
@baraki looking to order a couple of valves for older Ford TW35 and 7710 tractors. I believe I need the OC valves, but would I just need the 30l cutoff? Thinking UNF thread as well.
Thanks
Matt
do you somehow answer the orers, or do you sent it without any email.
ordered and paid by Credit Card on Tuesday, and no response YET.
Just wondering if anyone has fitted a valve to a Claas Lexion 430 and if a 30L OC one is what should be used?
If you search this topic, you will see both OC and LS are used on Lexions, so will need to look at your orbital to determine which is fitted.
Usually sends without any email notification, mine just turned up.
Orbital appears to be a OSPB250 ON, which is Open Centre, its just whether 30L is the right valve? And I see some in a post on here it says about using tees to plumb in the OC valve, I’m assuming that was if it was a closed centre system?
sorry, wasn´t been able to get on the tractor in the last time, today i checked the kaupoi pcb another time and i saw that the optocoupler was mounted false way around by me… works now just perfectly fine! thanks alot for your help!
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Your combine harvester has an OC steering valve and you need to connect a typical OC valve in series between the pump and the steering valve (orbitrol). In the 7xx series, there is a closed system without Ls, i.e. the orbitrol has 4 hoses, but the P line has a constant pressure of 180 bar and in the middle position, P is not connected to T. For this type, I have a special valve that needs to be connected with tees.
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I was able to do this a couple of days ago. There was just a very small flow when actuating the proportional solenoids.
I was not able to do any testing beyond this with the relief valve. I am currently using the tractor for lime spreading. When I’m done and have some more time, I’ll check the relief valve. I now have received some fittings to check the load sense pressure with a gauge. If I adapt a gauge to the swing valve port (M10 thread), is this a suitable place to check load sense pressure?
Hi @baraki,
I am working on installing autosteer on an IH 756 and 826, and would like to know which valve i need and how it should be hooked up. here is a picture of the stock steering system:
can i remove the IH “control valve” and put your baraki valve in as shown here?:
or should i install it like this?:
Thanks again Baraki, i look forward to getting this all running!
Hello Baraki,
Would it be acceptable to use the CCLS valve on a tractor with non-reactive orbitol per this schematic? This would be easier to install when the orbitol plumbing is not easy to reach. I know the power beyond flow is lower priority and U turn performance may suffer when lifting implements, and the safety is not the same, but this is the same plumbing as Trimble and Raven are using?
I was tempted to tee into steering lines and block the O ports, as you say many OEM retro fit kits do these including JD etc.
Works well.
Very easy install, yes that back window does open!
I have a dedicated power switch for pin 18 Cytron input and the power to the Lock relay for the Baraki valves, so can fully isolate the Baraki valve on the public highway.
Going to wire a switch in on brake pedal too, to kick autosteer out the moment it’s touched and before the physical brakes are activated.
Are there any consequences to having the steering hoses that long Teddy? I think you can remove the pressure sensor from the block, cap the connection, and then use a Tee for the sensor into the orbitol load sense line? It looks good, similar to what I was thinking.
I’m just trying to have a plan B and plan C before I order a valve. For my setup I think the valve will have to be on the rear of the tractor like yours Teddy. All the connections at the orbitol are steel lines behind the muffler and exhaust shield, I think I cannot add anything there. I think I can access all the proper priority valve fittings at the rear of the tractor, but if I cannot then I want to use power beyond.
The steering hoses are about 1.8m long from Baraki valve to where I join the factory steel lines to the front axle above cab steps:
Of course if Tee into steering line, could half the length oil travels from orbital to steering cylinder.
I’ve road tested it and it feels exactly the same, you cannot tell any difference.
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The priority lines from pump on this tractor are all steel and I would have to replace them all with flexible hose.
Power beyond is not used on this tractor so was easy decision.
I have spoken with a Baraki valve user in UK who has used Power beyond to power his Baraki valve on JD6830, he says even lifting heavy mounted seed drill and front linkage with cultivator at the same time has no noticeable difference on steering.
I wired up the Pressure transducer in case I needed to change install.
Thanks for all the answers Teddy.
One more last concern I have. If mounting the valve on the rear of the tractor and completing all the plumbing as Baraki intended, then the LSO line becomes quite long. Is there any concern about that adding any kind of delay? The tractor is LS-dynamic, so I think it would be ok?