IH 504 Hydraulic valve - What is this for????

Is this outer plate a power beyond cover plate? Just put a new 17gpm pump in and the flow to the auxillaries is dead-heading so hard it is nearly killing the engine at idle. This valve is an open neutral two way valve with float. When I say it is dead heading, that is with lever in any position. It will lift my haybine very easily now, but really loads the engine while the hydraulics are not being used (Power steering works very well also). If this is a power beyond add on, I assume I can run the output of this plate to sump, or buy a normal cover plate. It is worth noting that this tractor was owned by the state of Indiana for many years before my grandfather bought it around 1984 and may have had a loader on it or has been plumbed for multiple remotes. It is a 1964 International 504 (Utility).

My F504 row crop looks nothing like that. Also a PB plate doesn't look like that. Maybe that is the relief valve. Have you pulled the plug on the plate. Maybe it has a poppet in it.

Here is my F504 remotes.


Charles

Joe: To start off, unless your running a loader or other very high volume oil use like hydraulic motors you don't need a 17 gpm pump. 12 gpm is plenty for running just about any implement cylinder use known to the ag industry.

If it's dead heading, sounds as though your pressure relief valve is not doing it's thing. This may improve with time. If the old pump wasn't pumping much volume or pressure, just maybe the pressure relief valve hasn't had good exercise in a long time. It may require service or replacement.

What most folks that have installed 17 gpm pumps experience is the filter doesn't have the capacity to handle the extra oil flow. There is a larger filter, but it also requires a different or modified cover. However if the filter were starving the pump, I doubt if you'd have a dead heading problem.

If you compare your tractors remote with Charles the actual valve is very similar, almost bet it has same bolt pattern through end plate and valve. except he has two in the bank, you only have one. Being a Utility yours has different control lever. That end plate is different, which suggests to me that plug could be removed to supply power beyond to a loader control valve or valves. That end plate may be your problem, if the port was for power beyond supply, just maybe it has to be changed to an end plate same as Charles has.

Thanks for the info. Hugh: I would like to add a loader asap, so when the pump was found to be bad, I decided to go ahead and put the larger pump in. Charles: I have pulled the whole thing off a couple of times to figure out the routing of the oil through the circuit. The port on the plate where the pressurized oil leaves the remote valve goes to the large plug at the bottom of the cover plate. The port that would seem to be for the return oil is plugged off and there is no channel carved in the cast either. It seems that this plate was meant to block off the return port and send the pressurized oil out through the large plug. I thought maybe someone had seen this configuration before. Any help is appreciated.

This is an open center system, so the oil should be just dumping straight back into the sump after flowing through the valve bank.

If that is a power beyond block, then it should be dumping back into the sump. It should NOT be capped off. That will burn up a hydraulic pump very quickly. That may explain why the old pump was bad.

That is a power beyond plate. You need to allow the flow through the port where the plug is to return to the reservoir. When you add the loader you can add a pair of spool valves and have one for lift and the other for the bucket and still have you original couplers free for other use.

With a loader the 17 GPM pump should not be a problem. You will be operating at less than full throttle most of time so your actual GPMs will be less than rated.

I have a 1967 I-504 with two auxiliary valves. The valves do not have a part such as yours nor as the one on Charles' F-504 ( pictured in a post below) bolted to it. Mine are simply the " inner" and "outer" valves. There is nothing in the 504 parts book showing power beyond covers for the valves. However in my 2000 loader operators manual there is a diagram showing something such as yours. It is called a Transfer Block and Cover. The transfer block is used instead of an auxiliary valve. It is bolted at the same place as your valve is now. The cover has the port for supplying oil flow to a bank of valves mounted on the right hand side loader frame. Return oil from those valves is routed back to a port in the rear of the transfer block to be dumped into the tractor rear frame. What puzzles me is why there is no provision for returning oil to tractor reservoir. You say that it may have had a loader on it. Perhaps when the loader was removed they merely plugged the supply port and the return oil port wherever it was.
You can do several things.
1. Take the plug out and install a hose to dump oil back into tractor transmission housing somewhere.
2. Put a loader on it with hose to loader valves and then return oil as stated above.
3. Obtain a cover (such as seen on Charles tractor) to replace yours.
4.Get an "outer" valve and stack on top of yours and plumb it up to more auxiliary outlets. Charles' tractor has two "inner" valves on it. Outer valves are more plentiful at salvage yards than were inner valves.
I can scan and send you diagram from loader manual if you like. Reply to my e-mail if interested.

E-mail should now be unblocked.