Help with Blackhawk sk-64 air jack

[CarterD2015]

I am trying to rebuild a jack that I received after my father passed. It will air up without a load on it but leaks down very quickly. I don't trust it enough to place a load on it. I was able to locate the rebuild kit and now have it.

I attempted to disassemble the jack today without success. I have no idea how to do this. I have scoured the internet and I am unable to find any type of guide. I did find a blowup of the parts but that is it.

Any help would be appreciated.

Thx