Mr. Pete23...question for you.

Mr. Pete23, you seem to have an intimate knowledge of the hydraulic systems on the Farmall/International tractors. I was wondering if you can help me.

I have a 560 gasser, with 2 factory hydraulic outlets, and fasthitch with traction control. I have a Schwartz loader on it. Almost everything is working well, except the one outlet I use for the tilt function of my bucket "leaks down" over short times. It is not the rams on the loader, I can assure you; if i switch hoses on the problem outlet, the leaking changes in its speeds. Also, if I switch hoses on the problem outlet,I get a different amount of hydraulic force. If you totally switch hoses around, the problem stays with that specific outlet. The same if you use it on implement rams. It is the outlet on the right side, it is controlled by the small lever.

There is a bit of over travel in one direction on that lever/valve. If you push it away from you, it can stick, and it sometimes will not automatically unlatch when pulled toward you. I have taken the spool out, replaced the orings, cleaned the screened orifices, and checked that small plastic plunger. I did not replace the plastic plunger. The roll pin for the lever is not bent. I checked the valve body bore for size, surface finish, and out-of-roundness, and did the same for the spool. It is all within spec. It looks to be in good condition. There is no taper.

I am using the valve on the two-way setting.

What the heck am I missing? I am usually pretty clever; This one has got me.

I appreciate any ideas.

Thanks.

From what you are saying, having changed hoses from a cylinder that works good on the other outlet it leaves only two things I can think of. One of course is the valve spool itself. The other is, do you have a check valve bolted to the bottom of that valve and are the hoses running off that check valve. It was common practice around here to add that check valve to hold heavy loads from creeping down or even up when down pressure was needed for an implement. If the o-ring in there is shot, you will leak down and also have less pressure and flow from that valve. You also said short lever is the one you use. I take it you mean the shorter of the two for aux valves and not the shortest one on the right hand side which is for the fast hitch . Also, checking cylinders for internal leakage gets to be controversial. If you have a double action cyl leaking down and the cyl is hooked so the rod retracts into the cyl when it goes down, you in essence have only the area of the rod holding the load, pressure builds and equalizes on both ends of the cyl and will build to approx six times normal pressure and even a good valve will not hold. So many say to check for leakage , just unhook both hoses and if it holds the load up the cyl is ok. Not true, when that rod goes into the cyl as it leaks down oil is displacled. It cannot go to the other side of the cyl as the rod is coming into cyl . No different than filling a glass with water right to the brim and then inserting your finger into the glass of water. It runs over. If you have a cyl that the oil cannot leak to the outside, where is that oil to go. No place so therefore dia of the rod is actually holding the load. It is pretty easy to prove by drilling a hole in the piston to allow oil to flow to both side in cyl, lift a load , will probably need outside help to lift with that much leakage, and then unhook the hoses. It will hold that load forever or until it blows the hoses depending on weight of load. This is one reason John Deere had relief valves in their hyd cylinders as their hyd vaves sealed positive, no leak down. A leaking piston seal could cause hoses or cyl to blow, and or sitting in hot sun did same thing. Now on a cyl, like often used on the bucket of a loader , where the rod actually comes out of the cyl when it leaks down you have a completely different situation. Disconecting and opening hoses to isolate cyl is necessary on those. On a regular double action cyl, rod retracting when leaking down, you leave hose that is holding load connected, unplug other hose and if coupler gets tight you have a leak in cyl. Actually, you don't even have to unhook from coupler, one hose should be free, loose, if cyl is good.

The small Aux valve lever, not the teledepth lever, correct.

No, there is no check valve that I know of. The hoses off the aux valve feed two hydraulic cylinders, which contols the tilt aspect of the loader. It is all stock factory, as far as i can tell, and i have had this tractor forever. It has always done this, and I finally want to get to the bottom of it. I have a few parts spool and valve bodies; maybe i should swap one out? the over travel is odd to me.

Thanks for your thoughts; I appreciate it!!