There is a big difference between a D8 dozer and and a D3 and the same thing goes with track hoes. Example: I have a Gradall G3WD, It has a 5 foot bucket that holds about a yard of dirt with each scoop but they also make 1 foot wide bucket for the same machine that is used for digging trench for water lines or electrical lines. The same thing goes as far as reach goes on the track hoe some have longer than others making it possible to reach most of the digging with having to move around much.

My Point is equipment can vary.