About 9 years ago I bought a commercial intertech "pump" on the internet. I had the drawings and specs. on the unit. I have them stored away and can't immediately locate them. The only information I need to know is if this is indeed a pump or some type of hydraulic assist. The pump has three ports. One clearly marked "Inlet" and is the largest port. The two other ports being smaller but the same size are marked with a "P" and the other "S". The part number is 324-9110-202 with a serial number N119-11477. I'm sure someone with experience with hydraulics probably can figure it out with just the three port configuration. Most hydraulic pumps I've been around are only two port. Suction and Discharge. Any help will be appreciated!