Originally Posted by Kyna
The motor part on the jacks works great. However, one of the jacks is very hard to push up or down prior to activating the motor part.
Checking for a bent leg is a good suggestion.
But it sounds like you're talking about the extension leg, with the holes and a pin running through it.(?)
Grease, corrosion, dirt/sand and just plain old gunk can get up in there and make the two pieces of square tubing very difficult to slide against each other.
May have come out to be thoroughly cleaned. Or get it out as far as you can and clean as much as can get to.