School me on sega waverunner penumatics

I have a chance to get a good deal on a HUGE sega waverunner arcade game. You literally sit on a big waverunner jet ski and play. It supposedly works good but the "hydraulics" as the owner says dont work. He seems to think the compressor is bad.


WHat are my chances thats all thats wrong? Ive had my fair share of sega games over the years inclusing a deluxe trilogy but ive never tackeled a game with penumatics before.