Re: need help adding a two lever valve body on a smta

Posted by Stan(VA) on March 27, 2002 at 18:57:37 from (216.164.142.87):

In Reply to: need help adding a two lever valve body on a smta posted by Bill L on March 27, 2002 at 17:12:53:

I bought a 2 spool valve and mounted it on the side of the seat box by my right hand. Mine is on a SM, but same live hydraulics as your MTA.

Remove the 3/4" pressure line from the inlet to the reservoir (as opposed to the 1" return line that goes to the same places) and route the outlet back to the new open center valve, with the outlet from the valve returning to the reservoir where you disconnected originally (put the new valve in series between the pump and the reservoir.) The new valve will have an inlet (usually 3/4"), and outlet (same), and two work ports (up/down) per spool (usually 1/2"). I used 1 spool to operate a 3 pnt hitch and put quick disconnects on the other side.

I run without a loader most of the time and use the remotes for a wheel disc and the gate on a round baler. When I mount the loader I use the remote for the bucket control and the 1 way valve in the factory system for the main loader lift (with a restrictor in that line). Some loaders (like my IH 2001) have 1 way cylinders (no 2nd hose connection) so you can't set them up for down pressure anyway. If you set up this style lift cylinder on a 2 way valve, you have to plug the 2nd work port on the valve and the system loads up until the pressure relief kicks in while you let the loader back down. So the engine and the pump are under needless stress.

If I was running the loader all the time and had 2 way cylinders all the way around, I would probably prefer a loader control valve with both spools controlled by one handle and I would mount it either on the loader frame or the light bar, but the plumbing is the same (you want the new valve between the pump and the reservoir on the 3/4" pressure line).

To answer your question, no I havn't drawn this up. You probably would rather have the picture than the thousand words, huh! ;) ;)
Good luck,
Stan(VA).

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