Yeah, we used ours for some field work, but most of the hours on it is dozer work. Still, from 1958 to the late 90's before failure isn't too bad. I never ran the OC-4 that much, but as a youth 40 years ago, I remember not having a lot of patience waitng for everything to stop spinning so it would go in gear without grinding the gears. Ah, the impatience of youth!