Hi I am no Dexta expert I work on majors, the same thing can happen on super majors. i guess you have some kind of service book, what does it say for an unload valve in the hydraulic top cover, or for flow control valve in the part where you change from aux hyd to the lift arm function, on a major it is called the flow control valve housing or auxilary control valve. The symptoms you have are the same as what the supers do and it may be one or both of those are sticking. does the rear end oil look milky white with water contamination, that causes valves to stick as they get a small amount of rust on them and they are supposed to be a precise fit, I'm not sure what hyd filter a dexta has that may be getting plugged too. Regards Robert
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