1. Reservoir: to store a supply of fliud for normal system operation and reserve supply for emergency
2.Filter: to remove foreign particles a from the fluid.
2. Pressure section (Pressure Development or power section)
Hand pump: to provide hydraulic pressure for emergency or ground operation
Power pump: Deliver fluid under pressure to actuating unit of the system
3. Pressure and flow control section
1.Check valve: to allow free flow of fluid in one direction and prevent flow from opposite direction.
2.Pressure gage: To indicate the amount of system pressure
3.Pressure Regulator: To load and unload the power pump and to maintain system pressure between two predetermined pressure limits
4.Relief valve : to relief excess pressure in the system