550 dozer

[mick]

what is the differance between 550 550a 550b if any?

[digitup2]

there were several drive train up grades as well as horse power up grade motor up grades and hydraulic up grades every time . the 550Bs have a lot more aggressive blade it is even taller and shaped different under carriage up grades and hydraulic system as well as power shift up grades they were a great improvement over the 550-550A units at the time.Digitup.