I Bought a Koken barber chair, the guy said it worked great a few years ago... It wouldn't pump up so I put some fluid in it. It pumped right up then but I don't know how to get it to go back down. I have disassembled it down to the cylinder and don't see how to release the fluid so the chair will return to the ground... the cylinder has an end cap on it at the base, do I need to take that off to find the problem????? If anybody has any knowledge let me know .......... thanks