Overview:
By continuously improving our modernized approach to aircraft hydraulic testing, AERO Specialties’ new and improved HPU-4 delivers industry-leading performance, intuitive operation, and unmatched reliability, allowing for the streamlined servicing of regional, narrowbody, and widebody jets.
- Rugged, galvanized steel chassis offering excellent corrosion and fluid exposure resistance
- Sprung towing axle and pivoting front wheel assembly with parking brake
- Comprehensive digital display and control system
- Adjustable pressure and flow presets with touch screen control
- Push button control of bypass valve and reservoir selector valve
- Continuous monitoring and display of flow, pressure, temperature, reservoir level, and filter condition with optional contamination monitoring
- Timestamped performance data logging
- Toolless access doors allowing for simplified regular maintenance
Standard Features:
- 3-micron supply and 5-micron return filters
- Red and green LED status indicator beacons
- Audible startup/fault alarm
- Full length internal drip pan
- Full length hose drip trays
- Dual-fan oil cooler
- Easily accessibly reservoir drain valve
- Tie down points and forklift pockets
Options:
- Input Power Cable Lengths
- 50 ft (15.2m)
- 100 ft (30.4m)
*electrical plug not supplied by AERO specialties
- External Supply/Return Hose lengths
- 25 ft (7.6m)
- 50ft (15.2m)
- Single and dual system output hoses
- Systems not to be operated simultaneous on dual systems
- Tires
- Pneumatic
- Foam-filled
- Solid rubber
- Inline Contamination Monitor
- Return Sight Glass
- Phosphate Ester Resistant Storage Cover
Safety Features:
- Safety-rated motor soft starter with overcurrent protection
- Input voltage monitor
- Fluid overtempetature shutoff
- Reservoir high/low level shutoff
- Latching emergency stop
AMM Approvals:
- B737-NG/MAX, B757, B767 COM-163
- B777 COM-1796
The equipment listed on this information sheet must only be operated by appropriately trained aircraft technicians.








