Technical Sears older Green Floorjack Repairs

Any body got pic's or demo video on how to do seals and dis-***emble these jacks.
I got two here at home just waiting for me to get the courage and know how to tackle them.
One is an aluminum HF jack which I don't hold high hopes for but you never know I guess.

 

Just my $.02 so dont take this to the bank but my neighbor had 2 floor jacks he was taking to s**** because they no longer worked. Gave them to me so I filled them with jack oil with a seal conditioner I found at parts house. Four years latter they still work fine. I may have just got lucky.