I don't see the CC shaft? Your tractor looked like mine 2 weeks ago.
Anyway- while you have everything apart, There are two things I suggest you do, take the HST bushing out and clean the grease off the bushing and HST shaft. this way you can have all dirt taken out for smooth operation so you can regrease it again with clean grease. Note: you wont be able to take the HST shaft out all the way due to the driveshaft in the way. Be sure you remove the zerk fitting first.
Also the throttle, I see you have no lubricant on the metal plate it rides on. ( its halfway up the picture. I used white teflon spray and I sprayed the plate and the cables. Man what a difference!!!!!! I have to becareful not to pull on the lever hard anymore. Its the plate that causes so much friction when throttling up and down.