Hello all..
First of all, I'm an amateur, so take it easy on me.

I'm designing a project and I want to implement a motor with a higher torque and lower RPM. to be connected to a pulley system, to slowly pull and release a rope.

I don't have a lot of equipments in my area, but there is this 36v 24" linear actuator usually used to adjust the direction of satellite dishes. There was not a lot of data about the motor, although the dish it pushes is large.

Here is where I need someone with mechanical engineering background... assuming that the actuator can lift and release 20lb when it contracts and extend. If I remove the arm, and install a wheel, so that instead of the motor assembly rotates the actuator shaft, it rotates the wheel for the pulley. Will I can still lift the same weight? if I'm going to lose power, How much % will I use? (try to ignore gravity force).

I know that it's hard to answer without enough info on the actuator and its motor, but I just need an in-theory answer.

Thanks in advance.