WE USE A REXROTH MOTORIZED PRESSURE REDUCING VALVE THAT IS CONTROLLED BY A PLC, USING INPUTS FROM PRESSURE TRANSMITTERS. I DON'T KNOW HOW WE COULD DO THIS MANUALLY.
I AM CURRENTLY USING HOUGHTON 419R WATER GLYCOL HYDRAULIC FLUID IN A 1000 GAL. RESERVOIR. REXROTH VARIABLE DISPLACEMENT AXIAL PISTON PUMPS HAVE BEEN FAILING PREMATURELY, ONE AFTER ONLY 120 HRS. OIL ANALYSIS REPORTS CONFIRM NO CONTAMINATION.REXROTH SAYS THE FLUID IS LOSING IT'S LUBRICITY...
