one more hydraulic question

[MJPetersen]

Good Job on the scan and drawing. You are on the right track. Bird is right in that you do need an open center valve. it should be at or greater than your max gpm.

Think of those hyd blocks for aux hyd as detours. With the cover on the oil goes straight on its path (maybe a slight jog through the cover, but not much), but with the cover off and lines hooked up to the block the oil makes a detour to a valve, through the valve (power beyond port) and back to the other side of the block on its way to power the next thing in the line. You connect the line in and the PB circuits of your new valves to the blocks.

However, in your drawing, you are missing one very important line, the return to the tank. It is mentioned at the bottom of the picture from your manual. On your valve there must be a PB port (flows pressurized oil in the series) a return to tank (oil returning from the cylinders ) and a pressure line. Plus there will be 2 lines for every spool that you have in your valve assembly.

The above is what is necessary for the mid mount. It seems that the rear aux hyd is after the 3pt and therefore does not need the PB port as it just returns to the tank. Therefore your diagram will work, unless the valve has a relief then you need to attach the line to the tank return as stated in your manual.

Boy I hope that all made sense.

I was correct in my first post and my opinion holds

Mike

 

[gotrocks]

I plan to use the rear outlet so it seems I'm getting close to ordering parts.

But Mike, back to your earlier answer regarding the 5 gal/min vs 25 gal/min.
I have not had any luck finding an open center 2 spool at 8-10 gal/min.

Can you direct me to a possible source?

Or since you now know my plan do you think this valve would be servicable?

see pic.

 

[RonMar]

See, a pic is worth a thousand words. Open center valves are the order as you are installing them in series with the system flow. As mentioned if you are using the mid block, you will need a power beyond configured valve and that 7th hose for the return line(High pressure in, High pressure PB out, low pressure return out and 4 working lines, 2 per cylinder). A 6 hose non-PB valve should work on the rear block just fine.

I think you would be fine with a 20-25GPM valve on your rated 6+ GPM flow. I use a 25 GPM Prince 5300 series for my loader and grapple and it works fine on my 5+ GPM system flow(it is also all plumed with 1/4" line). As long as it is not a gross missmatch I think you will find it OK. If you find it too sensitive, you can always add restricted orfice washers at the working port connections to control the speed of the fluid flow.

 

[JerryG]

If I was plumbing a system like yours, I would order one of these two valves. The joystick is really nice to use with TnT, using the front to back for the top link and the right to left for the tilt. That is the way that I have mine on this tractor.
Surplus Center Item Detail
Surplus Center Item Detail

 

[kennyd]

Those joy-stick's certainly are nice...You can also get the Prince SV sectional valve, you can add one spool now, then add another next week if yo want! You can also mix-n-match different spool type if you want. They are rated for maximum flow of 16GPM, nominal 12GPM

PRINCE SV

 

[MJPetersen]

There you go--you got all the answers while I slept. You will find the lower flow valves much smaller, lighter, and, all things being equal, generally a little less expensive. All the valves suggested have an adjustable relief therefore you will need to run the return into the trany like in the bottom picture of your manual page.

Have fun and let us know how it goes.

Mike

 

[RonMar]

All the valves suggested have an adjustable relief therefore you will need to run the return into the trany like in the bottom picture of your manual page. Mike

Not necessarilly. It depends on how the valve is configured. If it is a valve setup for power beyond, it will have 1 high pressure inlet, 1 high pressure outlet and 1 low pressure outlet/return line.

A non PB valve will have one high pressure inlet and only one outlet line which is the combined High Pressure gallery and the return gallery. Since it is after the spool valves, this port will never see high pressure unless you restrict the outlet line in some fashion.

On those links to Surplus center valves, you will see accesories such as a power beyond sleeve and a closed center plug listed to the right. The PB sleeve replaces a plain plug in the side of the valve and adds an additional outlet point. The sleeve forces the gallery behind the plug to only exit thru the PB sleeve separating the high pressure and low pressure outlets.

Most all those valves at surplus center are open center, non power beyond so they usually show you the links to those optional plugs on the right.

If you wind up with a PB valve, since it is the last valve in the system, you can just "T" the two outlet ports together.

 

[gotrocks]

Keep um coming. I have read and re-read but I'm still confused.

If I could build this setup with 2x4s and a hammer I would not be such a bother. I would have had it working months ago.

RonMar, please look at the attached pic and "rub my nose in it"
to see if I can understand.

Since the valve states the PBeyond is optional are you saying I should be able to make things work with 6 hoses?

And not have to run back to the trany??? As Mike mentioned.

Once again I want to thank everyone that is responding to my confusion.
Please keep it coming, I still have not purchased any parts yet and it will be a while before I do.

We are going to my wife's sister's 80th birth day and at the same time her oldest niece who is 60. Let's see if I can still think clearly is that 140 years?

 

[MJPetersen]

Not necessarilly. It depends on how the valve is configured. If it is a valve setup for power beyond, it will have 1 high pressure inlet, 1 high pressure outlet and 1 low pressure outlet/return line.

A non PB valve will have one high pressure inlet and only one outlet line which is the combined High Pressure gallery and the return gallery. Since it is after the spool valves, this port will never see high pressure unless you restrict the outlet line in some fashion.

RonMar, in theory you are correct. I was merely emphasizing exactly what the manual says; "if the implement control valve has a relief valve, the tank port flow from the implement should be connected to the port located on the right hand side of transmission case." It does not specify if it is a PB or non-PB just the aspect of relief valve and it is specifically applicable to the rear aux port (as it is repeated for the mid port). That is why I stated that all the valves that were listed needed a return that "should be connected to the port on the tranny."

Gotrocks, the valve that you pictured has a PB port and a relief valve. Therefore, according to your manual, you should connect the inlet of the valve to the "A" port on the block, The PB to the "B" port of the aux block and the outlet to the tranny on the right side. You are right that the 4 green ports are the work ports.

I am looking forward to news of how it all works.

Mike

 

[RonMar]

Keep um coming. I have read and re-read but I'm still confused.

If I could build this setup with 2x4s and a hammer I would not be such a bother. I would have had it working months ago.

RonMar, please look at the attached pic and "rub my nose in it"
to see if I can understand.

Since the valve states the PBeyond is optional are you saying I should be able to make things work with 6 hoses?

And not have to run back to the trany??? As Mike mentioned.

Once again I want to thank everyone that is responding to my confusion.
Please keep it coming, I still have not purchased any parts yet and it will be a while before I do.

We are going to my wife's sister's 80th birth day and at the same time her oldest niece who is 60. Let's see if I can still think clearly is that 140 years?

Yes, if that is the last valve in the system, that valve will work with 6 hoses and NO PB sleeve/plug as your colored spots/arrows indicate. The drawing shows the power beyond plug/sleeve in place. If you had a side view of the valve, you would see a threaded port in that power beyond plug. The outlet port on the top of the valve(your blue arrow) comes from the return galleries from the work ports and the pressure relief gallery from the safety valve. It also connects to the main inlet gallery below it where that PB sleeve is shown. With a PB sleeve installed as pictured, the walls of the sleeve cover this last passage between high pressure port and outlet port and forces the HP line to exit thru the PB sleeve. The valve without a PB sleeve will have a low profile pipe plug(maybe 1/2" tall hex head) where the drawing shows the PB sleeve now.