John Deere 4052R Cab,, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements
My Befco Manual states to check the gearbox level, and top off as required.
You need to grease the casters and blade spindles. I do this every 3rd or 4th mow (about 10-12 hours or use). Just look for the zerk fittings.
And, of course, sharpen the blades as required. That's once a season for me, unless I hit something.