I got a hydraulic pump off a buddy of mine, for the dump on the back of my truck. ne how I know almost not6hing about it except it came off " a boom truck," I know it works because I wired and tested it. ne how i was wondering if any one might be able to tell me where i can find info on this pump as far as basic psi or quality ect... cause I was told i might need to put a pressure relief valve on it if the pressures to much, can any one explain this to me??? I was told I should be pushing around 1000 psi for my truck bed...

the only sticker on the pump says fenner Fluid Power, Part NO. 1787*AC 12v DC standard duty, im going to attach a picture if anyone can herlp me out, thanx...