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The first question you need to ask is what type oil or fluid is leaking : 1. If it is engine oil , then I agree it is probably tiny line going from engine block to oil pressure gauge . It would seem if that line is broken your oil pressure gauge would show no pressure or a significant drop from normal operating pressure around 30 . 2. If it is automatic transmission fluid (red ) , then that fluid would be coming from over/under shifter and could be one of two things : (a) lines from over/under unit to oil cooler on front of tractor go up right side of unit and then over the top of the fuel tank and could be leaking ; (b) rear seal on unit is leaking and when unit is turning chain coupler is slinging auto tansmission fluid up under the dash and then it is leaking back down . This could also be source of hydraulic fluid because some people use hydraulic fluid in over under shifter . 3. If if is hydraulic fluid , I agree most likely source is hose to steering motor in dash or place where hoses connect to the sterring motor . There are also hydraulic line that go to the side of the dash ( I think on the left ) and then up and over the fuel tank to the hydraulic cooler on the front of the tractor . If you need to get in the dash to do a lot of work , best thing to do is take off the fuel tank .
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