How do I replace the seals on a Pro-Lift G-2489 Hydraulic Jack?

To replace the seals on a Pro-Lift G-2489 hydraulic jack, first ensure the jack is fully lowered and disconnected from any load. Remove the jack from its base and take off the cover to access the hydraulic cylinder. Carefully extract the old seals, clean the cylinder, and then install the new seals, ensuring they are seated properly. Reassemble the jack, refill it with hydraulic fluid, and test it to ensure proper operation.