The more interesting thing I've found about d10 and d11 dozers is that some have elevators.  In large outdoor mines it is wrong to use too many of these large trucks that do not yield enough, wear out, are slow and fail due to dust.
Better to use the large conveyor belts (with car wash system) inclined in vertical inside the mines.
These have a fast, continuous mineral transport (night and day) and at low costs.