I removed the hydraulic pump, from my 335 MM utility, that runs the loader. I intend to transport it to a rebuilder in the morning, along with the 2 spool gresen control valve, that is letting the bucket to free fall. Looking on the computer, for a simular pump, so I could find out the GPM of my present pump, I noticed that the pumps were rated with max GPM at 1800 RPM. That makes me wonder if my pump is OK, but not being turned fast enough, by the belt pulley shaft! Does the PTO, and the belt pulley both turn at 540 max? If so then I need a way to turn the pump faster. My present pump is a Dayton model 6z005, and I havent been able to get the spec's from this puter. Any one know how fast a 335 minnie's belt pulley shaft turns?