I have seen a few threads on this board about restoring barber chairs. I have even seen some discussing the hydraulics. However, nothing seems to help me with my dilemma.
I am disassembling the chair - 1) to make break it into manageable pieces to haul up a few flights of stairs and 2) to restore the parts.
I have been able to disassemble everything down to the base and pump handle. Here is a diagram of what I have left to disassemble.

I have detached the outer column from the porcelain base. The hydraulic fluid has essentially all been drained. I have not been able to disassemble the pump shaft (and handle) or piston mechanism from the inner column. The inner column does not come out of the outer column for some reason I am unaware of. The result is the inner and outer column acting as a single unit trapped inside the porcelain base.
I have tried to remove the pump shaft and piston mechanism without success. I have tried opening up the end of the outer column without success.
Any help that can be provided to help separate the inner and outer columns would be greatly appreciated. Its quite exhausting wrestling with this beast to get access to examine things.
~ Mike