No old gasket.
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Kubota stuff only, but Kubota is checking to see if right filter as this is a 2006.Cheap aftermarket filters or genuine Kubota fikters? You realize there is internal pressure on the hydraulic filter?
Have used all before. Mowed and worked the bucket for 10 plus hours before it happened, and then it happened again.Did it happen once you started using the 3pt?
Or using the deck lift?
That's about what I am thinking. 5030. Tractors have a lot of built-in safeguards against too much hydraulic pressure. Hard to imagine everything failing and high pressure resulting.
Yes, the "adding shims to the relief valve" thing scares me too. I can't think how adding shims to a relief valve is going to lower the pressure. Usually it raises pressure.
A gauge test set is a good idea, everyone should have one. 5000 psi and liquid filled - Amazon has complete guage, hose, and adapters in a kit for less than $100.....sounds like the OP spent that much on hydraulic filters.
Suki, are you sure that the engine oil and the hydraulic filter didn't get exchanged? The hydraulic filter costs twice as much, it's heavier, and the shell is thicker. But they are about the same size and mounting.
I believe that model does have a cleanable screen under the hydraulic filter. But if it is clgged or missing it usually causes the opposite problem - too little pressure rather than too much. However, if it is missing or installed wrong it can cause a leak that might make you think the hydraulic filter "blew". You might want to describe how it blew. BigNoise? Or just lots of oil??
By far the most common hydraulic overpressures are caused by hoses. Either the quick connect ends are not seating well or the hoses are connected to the wrong ports. While waiting, I'd take them all off - one at a time - inspect them and make sure the connections are correct. Push on the quick change valves with something to make sure they are seating. And check for a mysterious oil leak or split down by the cooling fan underneath. That's a known trouble spot.
Luck,
rScotty
Thank you for the info. Our friend is finally looking at it. The Kubota dealer is three weeks out. He is a hydraulics guy and his research has sent him to a stuck valve possibly. No shims were added and a pressure test at bucket was 1250 when it blew. He says checking pressure at that point on tractor isn't telling you what you need to know. It has to be on the low side before it goes into filter. We have a gauge from bxpanded.com. The mechanics at the dealership have been excelllent but can't get it in for 3 weeks. We received hydraulic filters but they are checking to see if they sent the right ones. Also the filter that blew first was a year old. We don't run it in the winter, but it ran all last summer and fall and this spring. Will keep you posted. Something is forcing the pressure up on the low side of filter....may be a stuck valve.
Excessive flow is going to hydraulic filter.Isn’t the filters on the BX in the charge pump loop not return loop? Does the BX24 have priority flow control for steering that then feeds PTO and charge circuit. Should be a relief for steering, PTO and charge in that circuit. If this is the filter in question you need to check charge pressure.
Excess flow goes to implement with another relief in that circuit.
Been several years since sold my BX so don’t remember for sure.
It opens at the gasket and it destroys the inside."Charge pressure" is just another way of defining a specific pressure at a point in a hydraulic system. More specifically, In tractors with HST, "charge pressure" has come to mean the operating pressure within the HST. Some HST tractors have a separate hydrostatic pump and special filter for the HST. The BX24 doesn't have that extra filter.
The Kubota Workshop manual will define a port on the HST to hook your pressure gauge. That is the "charge pressure" you want
You keep saying "blew the filter" .... I am still wondering what that means? Did it split open?
Here is a hydraulic diagram and WSM for the BX23S. My guess is your BX24 is very similar.
It wouldn't surprise me that the problem with the overpressure to the filter is due to a problem with the hydraulic PTO valve. That circuit also has its own relief valve that would be worth measuring.
The WSM was too large to attach. PM me & maybe it will come that way. View attachment 3613779
rScotty
Do you think they would be the same for a 2006?Suki, I have just tried to send you the BX23S WSM via Personnal Message (PM). Let me know. It has full info. Much better than more recent manuals.
Also found in the WSM more hydraulic diagrams. One identifies (#3) as a relief valve that may also affect your filter pressures. Worth checking, but read the WSM if it arrives.
Nice to see someone willing to do their own diagnostic work these days instead of dealer.
rScotty
View attachment 3613831View attachment 3613832
the backhoe wasn't on the tractor. It had been disconnected two weeks before 10 hours of running time. It is after the reservoir I believe, not know terms, but they said on the low side. Our hydraulics friend said checking the pressure after the filter made now sense. Needs to be checked before.????Could you post a picture or pictures of where this filter mounts Just so that we are all on the same page.
Is this filter in the backhoe loop vs what manual shows as charge pump filter. Curious if backhoe had a filter or is this something added on by an unknown person.
Blowing innards on an element seems very unusual so makes a person wonder what are we missing.
spec is 1800-1850. It is happening before the filter. Replaced complete relief valve with no shims. Once fixed, we will add back. Our hydraulic friend has done some research and we will start with finding if a valve is stuck.Do you know what the spec is for pressure at the loader? That sounds low but it could be that’s spec for your tractor.