We have a BX24 and about 10 hours of work after disconnecting the backhoe, it blew the hydraulic filter. It was replaced and it happened twice more. We just changed the pressure relief valve and are waiting on a gauge to test. Anyone have any insight on this matter and are we missing something?
LittleBill21
Elite Member
does this unit need to be plugged back into the 3 point for the return?, you didn't leave all the hoses disconnected did you?
Yes it was. It seems like there is too much pressure. My brother took out the relief valve and it had no shims and he put 4 back in. We will test when gauge arrives tomorrow.
LittleBill21
Elite Member
Yes it was what?
plugged back in
Too many Kubotas
Veteran Member
Is there still on old gasket on the mounting surface by any chance? Were the filters tightened to spec?
dodge man
Super Star Member
Is there a screen in the hydraulic system? I had a BX several years ago and can’t remember. Edit, it does look there is a screen. Did you clean it?
LittleBill21
Elite Member
doesn't adding shims increase the pressure?
5030
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Cheap aftermarket filters or genuine Kubota fikters? You realize there is internal pressure on the hydraulic filter?
TMGT
Elite Member
Did it happen once you started using the 3pt?
Or using the deck lift?
Or using the deck lift?
5030
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Sure does and without a liquid filled pressure gage, that is playing with fire...
Pays to know what you are doing before you do it...
Reading along, I'm thinking the OP has the hoses incorrectly hooked up. I'll follow along to see the outcome...
I will double check but we checked all that. Not sure why it happened in first place as it had been in place for almost 10 months.
We have Kubota filters.
It was plugged back in.
I will find out and check it.
Kubota only.
dodge man
Super Star Member
I’m pretty sure they do have a suction screen, which can get pretty clogged. I don’t know if that coukd cause the filter to keep blowing off.
rScotty
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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
