How do jet aircraft parking brakes work?

[TheBusFlyer]

Hello,

I am having a hard time understanding how jet aircraft parking brakes work. I do understand how the brake accumulator can store pressure…but I am having trouble figuring out the path hydraulic fluid follows when the parking brake is finally set.

I suppose an hydraulic actuator helps to push against the brake disks. But once the actuator reaches the desired position, is the system not de-energized, thus storing the hydraulic energy left in the brake accumulator ?

Any input would be highly appreciated.

Thanks !