Tractors usually don't require much to be done at 100 hours.
Just the basic stuff, greasing, check bolts, check fluids, clean the air filters, lube the linkages and pivot points on the control levers with whatever spray lube you like the most, check tire pressures, things like that.
Ok, that sorta what I thought but it never hurts to ask. The stuff you mentioned is done regularly Nuts and bolts I check at every 25 hours don't take long and better safe than sorry.