Jay Honeck wrote:
I have a sticky main strut in my Pa-28-151.


Where do you live?

If it's in a cold weather climate, having sticky main gear struts on a
Cherokee is NORMAL at this time of year.

They stick a lot less if you fly it frequently (at least once a week),
and keep the struts free of dirt. if you do have it rebuilt, have the
A&P check to make sure the strut bushing isn't worn so that the strut
gets cocked slightly, jamming it position. If it is, the only solution
is to replace the strut bushings that the strut rides in.