Hydraulic Power Unit
Ordering Instructions

Step 1. Determine Size of the Hydraulic Power Unit required.

Step 2. Refer Aircraft's Maintenance Manual for Maximum Flow.
           (GPM) Gallons Per Minute
           All A&P Hydraulics power units have complete adjustable flow control.
           You may also use a 50 GPM unit for a aircraft that only needs 20 GPM
           because the flow can be adjusted to 20 GPM flow.
          (Note) 50 Hertz Electrical input will reduce maximum flow by 17%

Step 3. Refer Aircraft's Maintenance Manual for Maximum Pressure.
           (PSI) Pounds per Square Inch
           All A&P Hydraulics power units have complete adjustable pressure control.
           Aircraft's operational pressure is usually 3500 PSI systems.
           Some newer aircrafts have higher 5000 PSI systems.

Step 4. Refer to Aircraft's Maintenance Manual for Type of Hydraulic Fluid.
           1. Mil-H-5606                Red Fluid
           2. Mil-H-83282              Red Fluid - Fire Resistant
           3. Mil-PRF-87257          Red Fluid - Fire Resistant
           4. SKYDROL                Blue Fluid - Fire Resistant
           5. HyJet                         Same as SKYDROL

Step 5. Refer to Aircraft's Maintenance Manual for Complete Testing Procedures
           for testing the Aircraft's Hydraulic System.
           1. Single System
           2. Dual System. Will deliver two separate flows at the same pressure
               Includes two sets of pressure and return hoses. Also includes
               two pressure and return control valves.

Step 6. Check for Available Electrical Supply Service you have in your hangar
           or where the Hydraulic Power Unit will be used.
           Most Common Error is Selecting Incorrect Voltages and Amperage
           1. Available Voltages: 208 volt or 220 volt or 380 volt or 460 volt or 575 volt
           2. Available Amperage: Check with electrician for total amperage available
               and proper overload protection for input electrical power for hydraulic power unit.
           3. Hertz (Hz)  50 Hz or 60 Hz
           4. All hydraulic power units require 3 phase electrical input power.
               (Model 600 series hydraulic power units are available in 220 volt single phase)

Step 7. Call A&P Hydraulics Experienced Sales Staff for any questions or
           explanation or the complete range of Hydraulic Power Units that we offer.