I have dual rear hydraulics on my Kubota m7060 that are weeping out of the hole that is cover by a plastic ring. They leak more when using the rear hydraulics. When tractor is off they weep very slowly. I know this hole is to release pressure when attaching a rear hydraulic unit. The plastic ring is to keep the fluid from spraying out on to whatever. My question is, this is not normal, right? My last tractor did not have rear hydraulics!