Portable Hydraulic Power Unit – Diesel
This Mobile Hydraulic Power Unit is designed to provide a source of hydraulic power for aircraft hydraulic system testing. The system has three sets of external hoses. The unit can provide up to 60 gpm at 3200 psig total shared across the three output hoses with open or closed loop operation. The unit’s instrumentation includes main pressure, return pressure, flow and temperature display. The unit is completely self-contained.
Fluid cooling is accomplished through air-to-oil heat exchanger and direct-hydraulic-driven fan. The boost pump supplies a sufficient supply of fluid to the main pump. The main pump is a pressure compensated, variable volume piston pump with load sense. A flow meter in the main pressure line to the aircraft assures accurate flow readings. A bypass valve permits setting the main pump flow to a known value before supplying flow to the aircraft. The same valve also permits the operator to reduce system pressure quickly in case of emergency.
The power unit is capable of open or closed-loop operation. Independent electric fill pump allows the ability to fill the aircraft system without running the diesel engine. A return pressure regulator permits the operator to control the aircraft reservoir fluid level when operating in the hydraulic power unit reservoir (open-loop operation) mode. A thermal relief valve in the return system protects the return system from over-pressurization during shutdown due to thermal expansion of fluid. Particle counter with ability to sample from main system and oil purification system. Water sensor display in PPM units and oil degassing system
The power unit includes a PLC touch screen for all operation and maintenance indicators to warn the operator of a required filter change or faults. Safety systems include maximum pressure relief, low boost pressure warning and shutdown, over-temp, low/high fluid warnings/shutdown. Unit also has a wired remote control touch screen with simple functions to allow the operator control while close to the aircraft or in the cockpit. Wireless remote also available
