I have a 2015 Kubota L3390 that keeps blowing the seal on the hydraulic filter on the return side (the one under the left foot). I changed it with a new kubota brand filter and put fluid back in and ran it. It’s not a double gasket I made sure. I don’t have my hydraulic gauges on me to check pressure at the regulator (wife and I are moving, tools are ether at work or at the old house). Has anyone had this issue? And what was the cause? I did change the suction filter as well. The tractor has about 430 hours on it.