HYD REMOTE QUESTION

[/pine]

...The Previous Owner Had This single Valve Piped Off The Return Line Of The Loader Control....

just curious...

Are you sure it is not "piped" off the PB port on the loader valve ??

where does the return line from the "single valve' terminate ?

 

[Kitz]

Its A IH 244 21hpv Not New. Not Big. But Im Not Wealhty Either. It Serves My Purpose. They Sell A Adapter Plate That Will Go To A Aux Valve So I Figure Any One Of The Drawings Should Be Sufficient. Weather The CHEAP Valve Will Hold Up Is Irrelevant.

 

[Kitz]

Pine: On My Loader Valve Has Supply in Return out And Power Beyond Port I Removed Plug And Tapped It But The Aux Valve is a Short Hose Off The Out [return] Port To Valves [In ] Port Then Out To Downstream Return

 

[Soundguy]

Its A IH 244 21hpv Not New. Not Big. But Im Not Wealhty Either. It Serves My Purpose. They Sell A Adapter Plate That Will Go To A Aux Valve So I Figure Any One Of The Drawings Should Be Sufficient. Weather The CHEAP Valve Will Hold Up Is Irrelevant.

it's not irrelevant if they blow each time you use the hyds.. cheapest aux valves I've seen are 80$ plus shipping.. or 100$ local.

if you blow a cheap one each time you use it because you are using the wrong valve.. then it's quite relevant... then again.. your money and equipment too..

soundguy

 

[Leejohn]

Pine: On My Loader Valve Has Supply in Return out And Power Beyond Port I Removed Plug And Tapped It But The Aux Valve is a Short Hose Off The Out [return] Port To Valves [In ] Port Then Out To Downstream Return

Kitz It looks like when you drilled and tapped that plug you just made 2 out ports. I think you need a BP plug before it well work right. At least that is how I'm reading it.

 

[J_J]

If you just tapped a section on the valve, then you don't have PB. The PB is a selected thread and depth, and a sleeve is inserted to block off the return fluid, and pass hyd fluid down stream to the input of another valve.

If it had a threaded plug in the port, then all you needed was the PB sleeve.

 

[AKKAMAAN]

One can say there is two different return flows in an open center system. There is flow straight from the pump, and flow straight from cylinders and motors.

The PB sleeve separates the cylinder return flow from the pump return flow... Only the pump return flow can be used for a down stream PB valve....

 

[SPYDERLK]

I agree that 500psi at operating RPM with nothing in use is high. However I dont know that it is not normal. I have a pressure gauge hard plumbed into the output line of the 17gpm pump on my 7520 before any contol valve. It reads up to 700 when the rpms are high and the hyd oil not warmed. When the oil is at operating temperature it goes to a little over 500psi. Thats a lot of power being wasted and Id like to do something about it.
larry

 

[AKKAMAAN]

I agree that 500psi at operating RPM with nothing in use is high. However I dont know that it is not normal. I have a pressure gauge hard plumbed into the output line of the 17gpm pump on my 7520 before any contol valve. It reads up to 700 when the rpms are high and the hyd oil not warmed. When the oil is at operating temperature it goes to a little over 500psi. Thats a lot of power being wasted and Id like to do something about it.
larry

Great to hear that you have a Gauge constantly plumbed to your system....:thumbsup:

Every piece of hydraulic equipment should have a pump pressure gauge plumbed in....especially open center system....

500psi ("stand by" pressure), yes it is high, but also just a "normal" part of hydraulics when you add one or more PB valve....or have undersized valves, filters and lines....

500psi-17gpm= 5hp = 3.7kW.....quite a "furnace"...

 

[J_J]

Just curious if anybody knows the GPM capability of the 3pt valve. It could be that the 3pt has less flow characteristics than a FEL valve. Maybe the FEL valve is a 12 GPM, and you are flowing 17 through it at high rpm. You could probably see where the restriction is by placing the gage in a large hose after each valve, with the hose going directly to tank.

A lot of valves I have researched, have a 300 to 500 psi limit on the out port. In my opinion that particular valve was never designed to be used with another valve. The out port would normally go directly to tank. I am also thinking that the hyd pressure that the 3pt uses, is way less than the FEL . Soundguy mentioned an unloader valve in the 3pt. Can you [ Soundguy ] elaborate further on the relief and the unloader correlation, and the position of the 3pt lever in ref to hyd flow.

I remember one tractor, that the if the 3pt lever was up all the way, it would feed an aux circuit at the back of the tractor. The question came up when the owner said he had no 3pt, and the owners manual said to push the lever down a little, and the fluid then went to the 3pt. Don't remember which tractor.