well about the manual, i bought one right after i got the tractor, and then we moved, it got misplaced, my wife and i have been looking for it before i took the tractor apart , i didn't want to pay $50 for another one, so i was depending on well you , because i rembered you telling me that it was easy so i was hoping that i could get some help ,and just after i posted this it was found. lol, as for the markings on the little sector gear there is some marks on it, the marks are on the gears they are on the side of the gears i don't rember if the marks are on the shaft side or the side that the adjusting bolt slides on the gear.