All of the 50 seriies Olivers were good solid tractors with very few warts. The 1550 was no exception. The Hydra-Power shift and the hydraulics with a good CAT-2 3 point hitch made it a significant improvement over the S88 and 880, both of which were pretty decent tractors in their own right. If I remember correctly, with loaded 15.5X38 tires a 1550 should weigh something approching 7,000 lb.