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Is this orange cylinder (leaking) part of the old steering assist? Rebuildable? Removable?  Appreciate it.

Howard Power Assist. 
I have the same one and apparently the previous owner had mine fixed, sealed up and its leaking again. I knew something was amiss when there was a tupperware bowl under the unit inside the front compartment under the driver and the tupperware had red fluid in it. 
I am assuming it is rebuildable, I have heard that some folks love them and most of them seem to leak.