Help With Hyrdaulics...

Bryce Frazier

Well-known Member
So, I have a mag driven hydraulic pump on my Super M Farmall, and I am attempting to add a 4gpm priority valve into the system to feed my power steering motor.

I have the pump going directly to the valve, and then the valve going to a spool valve to run a remote cylinder.

When I fire the tractor up, I have no hydraulics anywhere, no steering, nothing at spool valve, nothing in return line.

Question is, on the priority valve, there are 4 ports, 2 I know for sure are the P priority port, and T tank port for the excess for P priority. The other two are CF and un readable. I was told by a buddy that the CF stood for constant flow and that was the line that would connect to the pump, is that correct?

I assumed that made sense because that is a 3/4" hose, and the other unknown one is a 1/2" hose, so it made sense to me that feeding the priority valve would be a larger line? What do you guys think? Thanks.
 
And prior to this the live hydraulics system was working on the tractor? Or are you also in the process of adding that? I agree that the T for tank theory is not correct. A priority valve normally ..throttles.. off a predetermined flow and pressure. There is no excess flow, whatever flow is not needed for the priority system flows on to the secondary system which is your auxiliary remote in this case. Is the priority valve new or used. I would suggest blowing compressed air through the valve to possibly help determine proper connections. As was said mfg. numbers or picture would be quite helpful.
 
Thinking about this more the valve could be both a pressure relief valve and priority valve so that could explain the fourth ..T.. port. I am assuming this is a used valve otherwise the supplier would be able to direct you how to connect it properly. Do you have any idea if it came off a system that was working properly?
 
(quoted from post at 17:51:14 03/13/21)

"I was told by a buddy that the CF stood for constant flow and that was the line that would connect to the pump, is that correct?"

No.

Armed with basic information (the make and model of the exact valve you have) go on GOOGLE and pull up a data sheet.

MITE be a little more accurate than "I was told by a buddy" and MAY avoid breaking stuff.
 
Surprised he didnt come back with something, I
suppose he is not the young whipper snapper he
once was. Hope he didnt break his pump or cam
gear by hooking it up wrong. I kind of miss his posts, I
sure liked seeing his stories as he progressed
through his projects. Seemed to have a good head on
his shoulders.
 

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