Congratulations. Dad had a 730 on the farm and it was a great tractor ... loaded with power for the size and just a solid work horse. I can only assume that your 530 is very similar in design and features.
One feature on the 730 that I loved (due my dad's bad habit of running trucks/cars/tractors out of fuel) was the compression vent. It was manually operated and opened the cylinders so no compression would build as the engine turned over. After he ran out of fuel (or if I was replacing the filters), I would refill the filters and tank with fuel; open the compression vent; turn over the engine to complete the fuel bleeding; close the compression vent. Without compression, the engine turned over very fast and the system bleed quickly without pulling down the batteries.
Enjoy, it looks like you have a good ole girl with this 530.