There are two hydrualic pumps on a 4020. One is in the tranmission and supplies oil to the front pump which lies between your steering bolster and under your radiator in the front. If the pump in the back is bad the one in the front will not work properly. You may be able to tell if you hold the clutch in for a while it will shut trans pump off if you lose hydraulics then the front is probably weak. The real way to tell is have the supply line checked with a flow/pressure meter that supplies front pump. If rear pump is weak you need to pull top cover and 3 pt cover to get at it.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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