I've got a Kubota b20 that has a small but persistent leak in the front hydraulic pump. I'm guessing the tractors 15 or so years old with between 1000 and 1600 hours on it. I've had it for 2 years and it runs strong. Only thing I've done is replace some hydraulic hoses and change the engine oil. What should I do about the leak? I was just gonna start taking the pump apart to check it out but I've never worked with hydraulics so I figured I should ask you guys about it.