After about 3 years of replacing half moon keys that kept sheering off, eventually causing other problems along the shaft I had to take my hydraulic drive motors to a danfoss dealer and get the shafts replaced. They replace them with a square key shaft that works just as well as the half moon key(don't know why Carlton didn't use these ones to begin with, u can cut a key out of standar square bar, instead of scrambling for an elusive half moon key) anyway, I also had to buy 2 new hubs as those were also damaged and worn from the nearly monthly key shearing that was going on. Once I did that, no more problems. Carlton sent some of the first 4012 kobo tags out with hubs that were too wide so when u tightened the hub nut, the hub would press agains the motor and not tighten onto the tapered shaft properly, that's why the keys shear, no matter how hard you tighten that big nut, it won't fasten to the taper because it can't go on far enough. Very expensive exercise, and none of it is us the consumers fault. Anyway, now that I've gotten over that I have no problems, and I still just love the machine. If you can GET THE REMOTE, it will change your life.
