930 power beyond?

[Red Whiskers]

Put a loader on my 930 and would like to free up my remotes. Is there a way get power beyond?

 

[Case Nutty 1660]

930CK? if so it is easy, I unhook the hose from the hyd pump, then run a new hose from there to the new valve then run from the new valve to the unhooked hose that goes to the remote and Draft-O-Matic valve

 

[mmidlam]

I would take the pump output line off and have fittings/adapters made up. One line from pump to new valve,a line from new valve to old tractor valve and a third line from new valve to transmission/reservoir. An external power beyond valve will have a third line dedicated return.

 

[Adirondack case guy]

As Bro said, just plumb a loop. You don't need a third line back to the resivoir. This is a simple open center system, and the return feeding back to the valve dumps into the tranny housing/resivoir.
Loren

 

[mmidlam]

Yes, that is easiest. Its been years since I worked on those hydraulics but I am thinking there can be some interaction. What happens if you try to lower the loader valve while raising the 3 point or using a remote remotes?

 

[Adirondack case guy]

I guess it would sort of come down to whether your body is equipted with two right arms and hands.
Loren

 

[Red Whiskers]

Thanks guys that's what I was thinking. I've done that on other tractors before. Not worried about the valve action conflict as I came equipped with only one right hand and arm and at 72 it's not as fast as it was.

 

[mEl]

(quoted from post at 05:53:44 12/02/14) Thanks guys that's what I was thinking. I've done that on other tractors before. Not worried about the valve action conflict as I came equipped with only one right hand and arm and at 72 it's not as fast as it was.

Guys, if you break the feed and install a open center valve without a 3 rd line it will be fully pressurized when the remotes and hitch are used, the circuit to reservoir will be pressurized. The result will be system pressure against the spool seals and backing up against the backside of the valves main relief rendering it ineffective any time the downstream valves are used.

Open center valves to be used in this configuration have a power beyond sleeve to direct the oil straight out of the valve without pressurizing the loop circuit which is the circuit by which all drains to low pressure go back to sump, (3 rd line)

If you use a valve with a power beyond, you must have a 3rd line to protect the inline added valve. This is why you have to remove or install internal plugs in the outlet and add a drain (3 rd) line in valves that can be used for either application.

You may get away with it because the added valve's relief can dump back to the circuit but you will be adding a strain against spool seals for which they were never intended, besides the added valves relief pressure will be raised by whatever the back pressure in the tractor is which could be very significant as the relief valve must overcome back pressure from the tractors systems to open.

Sorry to disagree with some very good minds but hydraulics has been my life.

Respectfully, mEl

 

[1030 TOM]

nutty said it the best ,my 1030 has 2 extra valve outlets plus a valve oil goes tru to run the power steering ,broke the line at the pump ,ran tru all open center valves then back tru the filter easy works great tom in ky

 

[mEl]

mmidlam,

You have it right, the third line and a power beyond type valve is the correct way, that way the low pressure circuits within the add on valve are not subjected to system pressures they were never designed to handle. When a valve is installed in the manner mentioned its complete body is at system pressure and there are areas within the valve which are not designed to handle it, spool seals for one are designed for static pressure only, not main relief from a downstream valve. I knew when I answered this post it would be controversial but needed to be brought up anyway. You were correct in your original post.

mEl