i got my floor jack from Costco a few years ago. it worked well. now it will only jack it up half of its max height.
is the problem cause by not enough of fluids? broken seal?
I dont think you can rebuild the seals you can always put more oil in it and or use thicker oil and or use a swelling agent in the oil as a temp fix of course
Je trust plus une paire de chandelle qu'un joint torique a 4 cent...
BTW essaye de le démonté, j'en ai démonté 3, c'était toute des joint torique ben chieux a moins de 1$, parcontre prend pas ceux de rubber ordinaire, sa prend le grade pour les produit pétrolier sinon l'huile va le manger.