Top agitator did not work

I removed the cover for the softener dispenser on the top of the agitator. Then reached in and removed the cover of the nut and washer which was very sticky and sealed with an o-ring. This took a bit of pressure. Then used a socket wrench with an extension to loosen the bolt and took the whole agitator out of the machine. Then I set the agitator on the floor and with a fine 12 inch long screw driver released the catches while turning and pulling the agitatior with my other hand and holding the lower agitatior on the floor with my feet. I then turned the upper part over and removed the cogs and holding mechanism.
Then I reversed the process after replacing the cogs with the new part. 25 minutes total.