Was asked to look at a hydraulic assist revolving door. After getting power to hydraulic unit it waould only produce about 100 psi checked with 2 gauges. Motor amps are low. Tried plugging all ports to isolate hyd. unit and still would only pump 100 psi. I don't know what normal operating pressure is supposed to be, but gauge on unit goes to 2000 psi and hyd. lines are rated to 2750 psi. I'm thinking 100 is way to low with only 1/4 lines and a huge, heavy door to move. I'm thinking pump is weak and would like to remove and tear down, figure I'd see if anyone here has any input before I go further. I've pretty much isolated the hyd. unit but maybe I'm missing something. Thanks for any ideas.