What type of fluid for a 69 convertible top pump?

Ok after reading all that info when I replaced the hoses the fluid that did drain out smelled like hydraulic oil so I had some hydraulic jack oil here so I filled the system with it and did notice that it foams a little so my question is what would be the best way to drain it now break lose one of the fittings and drain out as much as I can than refill it with dextron trans fluid? According to the instructions that Jim sent that's what it said to use or will I be fine with what I used?
Pat