I have an early 1980s B7100 with a manual gear drive. I use it only for bush hogging a 2 acre horse pasture 2-3 times a year and maybe 2-3 times a year dragging it. Every couple of years the hydraulic lift stops working - I check the hydraulic oil on the dipstick (photo) and its like (almond) milk. I've drained it now 4 times over the years and the oil filter screen (there's only one) is completely clogged with a white creamy oily residue. Clean the filter, new oil and the lift is fine again. The filler cap and the dipstick are sealed - can't see how these are letting rain in. How can water be getting into my transmission hydraulic oil? The engine radiator uses some water - is it possible that the coolant is getting into the hydraulic oil? I'm using the best Kubota Hydraulic Oil Super UDT - but would be interested in a cheaper alternative given this situation. I have a FEL and don't have water in that. I'm hoping there's an obvious simple answer to this. Thanks!
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