My L3940 took 11.4 gallons in the HST, and 1.8 gallons in the front axle. I assume you are getting 2 gallons to top off the front axle (they show low after an hour or 2 of work), and to top off HST after filter replacement. Philip.
When we decided on the 50hr service to be included we agreed to what was due at the 50hrs and the front axle and hst wasn't listed at that time (50hrs) but yes he included 2 gallons for hst filter change. He said I would have to change the hst filter on the fly therefore the need to top it off. We really didn't discuss anything about the axle fluid and it already has a few hours on it so I'll call and make sure he checks it before delivery..... Although he did say they will check all fluids before it leaves there INCLUDING a full tank of diesel