Those valves do start to get worn. The balls on the detent get some wear and you will have to turn the pressure up a little to get it to fully retract. I like to put a T with a gauge on the inlet of the valve so you can see what pressure the return kick out is operating at and what pressure the relief is set out.Yup I loosened the jamb nut and turned in the screw about half a turn works great seems odd that this can just happen.. is that sign of wear?
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