5. (20 marks) Shown above is the Series 720 Hydraulic Power Unit from A&P Hydraulics that can be used to power many aviation based hydraulic systems found in aircraft such as the Boeing 737 Series, Bombardier CRJ, Embraer ERJ, Gulfstream etc. With the help of the circuit diagram given below, explain the operations of this hydraulic power unit, listing the purpose of its individual components. NOTE: Return Fe Diffuser Units Reservoir O Temp окот Pump Reservoir Selector Flow Control Press Press Flow Meter Gauge Pressure (To Aircraft) Pump Pressure Control о Cooler By-Pass Valve Dual System Selector Valves (Optional) Return (From Aircraft) Series 720 Hydraulic Power Unit Schematic - All circuits/circuit components must be hand drawn neatly Hard copy of assignment is to be submitted. Marks will be awarded based on neatness, and correctness of work submitted.

Fig: 1