After 30 years flying Boeings... not much has changed except for carbon brakes.
After landing and parked, brakes set... chocks in place... brakes released.
Before engine start, brakes set, tug connected.
If the bird was overnighting... brakes set before shutting it down for the night. I rarely saw brake pressure equal to accumulator pressure. Its a good system with check valves to prevent back flow of fluid or pressure to the normal hydraulic system.
Rejected takeoff??? simple... after the jet comes to a stop... tiller full offset... brakes released to prevent wheel lockup... start the APU and shut down the motors. Whiel the aircraft is being towed to the stand... think about the acivities for the evening... once on stand... chocks in place before tug is disconnected so the brakes don't have to be set.
Go th the hotel, and have a great night.
