Tronair Aircraft Hydraulic Power Units: Complete Buyer's Guide
Key Takeaways
- Tronair HPUs are the industry standard for aircraft hydraulic power, used across commercial, regional, military, and business aviation environments – trusted by OEMs for use in their own maintenance facilities.
- Tronair's industry-leading filtration delivers clean, precisely pressurized fluid to aircraft systems, extending hydraulic component life and reducing the frequency of aircraft filter changes.
- Input voltage must be confirmed before ordering – Tronair HPUs are not multitappable between 50 Hz and 60 Hz, and operating on 50 Hz results in a 17% reduction in flow and pressure output.
- The extensive options list allows operators to configure their HPU precisely for their aircraft and facility – from extended hoses and dual systems to voltage monitors, pyrometers, drip pans, and remote emergency stops.
- PJi is an authorized Tronair distributor and service center, offering new and used HPUs, a GSE trade-in program, flexible financing, and full parts and service support for the complete Tronair lineup.
Tronair offers a comprehensive range of hydraulic power units engineered to meet the specific requirements of your aircraft. Trusted across commercial, regional, military, and business aviation environments worldwide, Tronair HPUs are the industry standard for reliable, precision hydraulic power on the ground.
- Fully customizable HPUs configured for your specific aircraft, with a wide range of available options (see full options list below)
- Premium-quality components and manufacturing held to the highest industry standards
- Industry-leading filtration technology delivers clean, precisely pressurized fluid to your aircraft – extending component life and reducing the frequency of aircraft filter changes
- Trusted by OEMs for use in their own maintenance facilities worldwide
- Engineered and rigorously tested for consistent, dependable performance in demanding aviation environments
5606 / 83282 Hydraulic Power Units
Pressure & Return HPU Couplers
Have any other questions? Just ask us! We're happy to help!
Are the units multitappable and compatible with multiple input voltages?
Tronair HPUs are not multitappable for 50 Hz or 60 Hz input voltages – you will need to confirm your facility's 3-phase input voltage before placing an order. If you have an existing unit and need to change its voltage configuration, procedures and parts are available to support that process. Please contact us with your unit's model number and serial number, and we'll coordinate with Tronair's engineering team to provide the correct steps.
Is there a reduction in GPM/PSI when using the units on 50 Hz?
Yes – operating on 50 Hz results in a 17% reduction in flow and pressure output compared to 60 Hz operation. This should be factored into your aircraft compatibility assessment when selecting a unit.
I already have aircraft couplers that came with our new airplane. Do I have to order them on a new unit?
No – aircraft couplers are not required to be included with a new HPU purchase. If you have existing couplers that meet your aircraft's requirements, simply let us know when requesting a quote and we'll remove them from the configuration.
I would like to use one hydraulic power unit to power both aircraft models we operate. Is it possible?
It depends on the specific hydraulic requirements of each aircraft model. In many cases, a single higher-capacity HPU can cover multiple aircraft types, but this requires careful review of each aircraft's pressure and flow specifications. Contact us with the aircraft models you operate, and we'll work through the compatibility with you.
I need filters for my unit. Can you help?
Yes – we offer a full range of Tronair HPU filters and would be glad to assist. Please provide your unit's model number and serial number so we can identify the correct filter specifications for your unit.
How do you ship these units?
All Tronair HPUs are shipped fully crated from our facility or the factory to protect against transit damage. Shipments are made via LTL freight carriers, including Estes Express, FedEx Freight, UPS Freight, and others, depending on your location. Please note that a forklift is required at your facility to unload the crate from the delivery truck upon arrival.
Getting a quote is straightforward. Contact us with the following information, and we'll handle the rest:
- The aircraft type(s) the HPU will be used on
- Your facility's 3-phase input voltage (in volts and Hz – either 50 Hz or 60 Hz)
Quotes – Please allow one to two business days for HPU build times and pricing after your request is submitted.
Trade-In – We accept quality used GSE as trade-in credit toward new Tronair equipment. Contact us with details about your current equipment, and we'll provide a trade-in assessment.
Used Equipment – View our current inventory of used HPUs on our Hydraulic Power Units & Couplers category page.
Below is a guide to obtaining your model #
| Option A – 25-ft (7.6 m) Hoses Replaces the standard 15-ft (4.5 m) hoses. Note: Option AA may be required for dual system configurations (Option C). |
Option B – 50-ft (15.2 m) Hoses Replaces the standard 25-ft (7.6 m) hoses. Note: Option BB may be required for dual system configurations (Option C). |
| Option C – Dual System Adds a second set of pressure and return hoses with shutoff valves. |
Option D – Dual System with Crossover Check Simulates a helicopter main system failure to test the secondary system for correct operation. |
| Option E – Hourmeter (50 Hz) Adds a runtime monitor to help schedule filter changes and other maintenance intervals. |
Option F – Hourmeter (60 Hz) Same function as Option E, for 60 Hz configurations. |
| Option G – Voltage Monitor (200V/230V AC) Adds automatic shutdown protection in the event of incorrect input voltage, phase loss, incorrect phase sequence, low or high voltage, or voltage imbalance. |
Option H – Voltage Monitor (380V AC) Same function as Option G, for 380V AC configurations. |
| Option I – Voltage Monitor (415V/460V AC) Same function as Option G, for 415V/460V AC configurations. |
Option J – Voltage Monitor (575V AC) Same function as Option G, for 575V AC configurations. |
| Option K – Pyrometer Adds a temperature gauge to monitor return oil temperature during operation. |
Option L – Electronic Reservoir Level Sensor Shuts the unit down if the reservoir fluid level falls too low or rises too high. Includes panel warning lights. |
| Option M – Hand Pump Adds a 5,000 PSI (345 bar) Hi/Lo hand pump, 2-micron filter, and 10,000 PSI (690 bar) pressure gauge for reservoir servicing or component testing. On 51, 5B, and 5C Series units, a 500 PSI (34.5 bar) hand pump is added without a pressure gauge. |
Option N – Towing/Trailer Package Adds rubber tires, leaf-spring suspension, automatic brakes, and a towbar for easy repositioning between hangars and across the ramp. |
| Option P – Overflow Return Hose Adds a reservoir return dump hose from the aircraft reservoir to the unit reservoir. |
Option Q – Calibration Port Adds the capability to attach a test gauge to the instrument panel for pressure gauge calibration at rated capacity. |
| Option R – Electric Filter Clogging Indicator Adds a pressure differential sensor across the filter, with a panel warning light to indicate when a filter change is required. |
Option S – Overtemperature Shutoff Sensor Adds a sensor to the return system that shuts the unit down before it overheats. Includes panel warning lights. |
| Option T – Return Backpressure with Return Sight Glass Controls return hose backpressure with a sight glass included. Required for use with certain Citation aircraft. |
Option U – Return Sight Glass Adds a sight glass to monitor for air in the return line fluid. |
| Option V – Return Backpressure Valve Adds an adjustable backpressure valve that prevents the aircraft reservoir from draining back to the unit reservoir. |
Option W – Return Filter Adds a 5-micron return filter. Applicable to Series 50 and 51 hydraulic units only. |
| Option X – Height Extension Unit Raises the controls on Series 50 hydraulic units to a more comfortable operating height. |
Option Y – Dual Return Sight Glass For use with dual system configurations. |
| Option Z – No Return Valves For use with dual system configurations. |
Option 1 – Return Backpressure For use with dual system configurations. |
| Option 2 – Red Stack Light Tower light with red LED indicator. |
Option 4 – Drip Pan Stainless steel pan to cover the base of the unit, containing any fluid drips and protecting the hangar flooring. |
| Option 5 – Remote E-Stop Handheld pendant with an emergency stop button on a 50-foot cord for safe remote shutdown. |
Option 6 – Return Sight Gauge (Triple System) Adds sight gauges to monitor for air in return line fluid for triple-system configurations. |
| Option 7 – Hand Pump (Large Displacement) Adds a 200 PSI (13.8 bar), 8 cu-in/stroke hand pump, 2-micron filter, and 300 PSI (20.7 bar) pressure gauge for reservoir service. |
Option 8 – Pressure Reducing Valve (Dual System) Adds the ability to independently adjust pressure in both hydraulic systems. |
Looking for Service & Parts?
You're in the right place!
As an authorized Tronair Service Center and parts supplier, Pilot John International® (PJi®) provides full-lifecycle support for your Tronair HPU – from routine maintenance and calibration to repairs, overhauls, and replacement parts. Whether you need a filter or a full-service event, our team is here to keep your equipment operational and your aircraft on schedule.
Trade-In & Upgrade Equipment
PJi's GSE buy-back program makes it straightforward to trade in used Tronair equipment and apply its value toward a new purchase. Contact us with details on your current equipment, and we'll provide a trade-in assessment.
Contact us, so we can help you on the ground, to keep you in the air!
Rentals & Finance
PJi offers flexible rental and financing programs to match your operational needs and budget. Whether you need a short-term rental during a peak maintenance period or a long-term financing solution for a new HPU purchase, we'll work with you to find the right option.
