Hi, deejay.
I am ready to be corrected, but..
The trucks that you list are all 'design' vehicles. That is, they are basically mathematical fictions (and not actual vehicles), specified for the single purpose of establishing acceptable design loadings for bridges or whatever.
For the purpose that they have been specified, there would be no point in indicating a set of 'unloaded vehicle loads'. For engineering design purposes, one would either assume the presence of a vehicle loaded to its full design value, or no vehicle at all. The in-between case of partly loaded vehicles would not usually be relevant.
If you want to know actual vehicle masses, I suggest that you look elsewhere.