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504 hydraulic noise

D

DTK

Member
Is there a way to stop the whine in the hyd. system
on 504 rowcrop? Have put in new O-rings on filter
to pump sleeve and over filled the trans. w/ hy-Tran.
Any help would be appreciated. Thanks DTK.
 
Overfilling is absolutely NOT a cure for anything on these small frame tractors. It is a waste of hydraulic fluid.

The only tractors that overfilling has any effect on is the LARGE frame tractors such as the 706, 806 and above/newer.

The whine is being caused by a restriction in the system. Where? You'll have to figure that out.
 
From what you have described I am thinking that you worked just from the filter side. If correct there is also two o-rings on the pump side, one inside the pump inlet and one on the sleeve that pulls toward the middle when there is a vacuum created by the pump. If those are not seated correctly it will whine. I agree overfilling those does not help much if at all. Another few things is some tractors just have a small whine that is normal and you get used to it. Hopefully someone did not put a larger pump on it as the filter cannot keep up and that will cause a whine also.I was chasing a low performance issue(whine and low flow) on a 560 which is the same style and changed all the seals including splitting the tractor and ended up with the pump,and new tube, found out the 17 gpm was worse, and took that back. Glad the salvage worked with me on that. Almost need a flow check done,You can buy a pressure gauge (3000 Psi) and check the pressure. One more though does the hydraulics sound like it is on pressure? Just some thoughts. Like mentioned need to dig a little more.
 
After restoring my 504, which included having all the drain plugs out for a couple years, I put about 6 hrs on it the first summer. Initially it had quiet hydraulics, but by summers end had developed an ear piercing whine at any rpm slightly above idle. The hoses at the pump would buzz in your hand. I used all new hytran, pump filter etc. To let any moisture separate, I let it sit over the winter in an enclosed, unheated building, then in the spring, drained the fluid, looking for some blockage or a stray oring or something, but all I found was a milky film on the filter and a little milkyness in the first fluid that came out. I changed the filter, reused the fluid except for a gallon or so with moisture. Hydraulic noise disappeared and may have just started to increase a little by summers end. Never had a tractor build moisture during summer months and I was shocked the filter change solved it. Seemed the moisture on the paper of the filter prevented the fluid from passing. So if I change my filter every 8 hrs, I'm good! Be curious of others experience.
 
Myself i would start with checking the flow divider then on to the relief valve and if necessary then into the three point unloader valve .
 
On my 504 I had the same issue with moisture in the Hydraulic fluid, I used the tractor to move round bales and in mid winter the 3 pt. quit working, I removed the filter cover only to find the filter frozen solid. I replaced the filter several times, changed the fluid and finally just pulled the filter in winter and replace in spring.
Where is the water coming from??
Thanks
 
If the water contamination is significant enough one oil change isn't going to cut it, especially if you're changing it when its frozen.

Do you leave the tractor outside? Rain is a major source of water intrusion.
 
(quoted from post at 22:33:43 11/15/19) If the water contamination is significant enough one oil change isn't going to cut it, especially if you're changing it when its frozen.

Do you leave the tractor outside? Rain is a major source of water intrusion.
Click to expand...
he tractor is always inside. New oil. New filter. New O-rings on pump sleeve and in pump . Is that thicker filter housing still available ? My local IH dealer can t find one, been checking salvage yards. Thanks
 
I have the same issue (although not ear piercing)....summertime-no problem, get below 40 and the whine starts. I do not have water as I have drained the fluid twice.
 
Like I mentioned earlier, I wouldn't believe the filter was the issue after a few hours of use but it was. Had a creamy film covering the perimeter. Try a filter change, you'll know immediately if the problem was a restriction.
 
I talked at length at an older mechanic at Hoobers (Case IH dealer) about my issue. He assured me the higher capacity pump and deeper filter were not my problem. He mentioned the few applications it is used on (don't remember anymore). The higher capacity filter was about 1-1/8 thicker if I recall correctly. He had a filter and I recall seeing the raised cover on a tractor somewhere in my travels. Mine is also always undercover with all new fluid etc. There was very little moisture in it when I drained it down but still the outside of the filter had a thick enough cream covering I had to squeegee it off or it just hung right onto the filter paper. Just my thoughts.
 
Question, does the whine change when you turn the steering wheel?
I have a 65 2504(same as the 504 but with a casting where the front axle hooks in).
Mine has the first gen flow splitter, it causes horrible cavitation noise, they went with two later models of splitter, I assume due to the cavitation noise.
I rebuilt my splitter three times and looked at swapping mine out but it looked like they changed castings and mounting castings and it wasn t worth the bother. It has whined for the 15 years I have had it.
If you find out better I would love to know. Good luck.
 
it seems to do it much more when it is cold outside and when it starts up for a few minutes so I chalked it up to "the oil needs to warm up". I used it quite a bit the last 2 weeks and I can't say that I even noticed it....maybe conditioned but probably the warmer weather reduced or eliminated it.
 
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