Tronair 673A Diesel Engine Hydraulic Power Unit

Tronair 673A
Tronair 673ATronair 673A
Manufacturer: Tronair
Part Number: 673A
Condition: New
✓ Worldwide shipping options available
✓ Manufacturer CofC always available at no cost after shipping
✓ Operating manuals available online for purchased equipment
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The 673A skydrol diesel engine hydraulic power unit has a cummins engine and is for use with skydrol fluid. This unit is rated at 0 to 34 GPM and 250 to 4000 PSI.

Standard Features

  • Cummins, QSB4.5P130, Tier 3, 130 HP, 1800 rpm diesel engine (Jet-A or diesel fuel)
  • 0-34 gpm, 250-4000 psi, flow and pressure ratings
  • Dual system with 50' (15 m) pressure and return hoses, pressure and return coupling for both systems
  • Hydraulic System Meters: Digital (0.1% FS) flow meter, digital (0.25% FS) pressure gauge, digital (0.5% FS) temperature gauge
  • Engine System Monitor: Back lit digital display and diagnosis (DDD) with hour meter, and LED indicator lights
  • The Engine DDD is a multifunction tool, which displays many engine-operating parameters including oil pressure, oil temperature, running hours, RPM, coolant temperature and fuel consumption. For the technician, the DDD can display service reminders for filter replacements, active fault codes and stored service codes for easy engine maintenance and diagnostics
  • Hydraulic system open or closed loop
  • Pressure Control Valve
  • Bypass Valve for loading and unloading
  • Hand Pump Gauge
  • Pressure Gauge Calibration Port
  • Calibration Port Shut Off Valve
  • Selector Valve to select between aircraft or HPU reservoir
  • User friendly engine control panel for easy operation, includes service tool socket
  • Pressure Filtration: 2 micron, non-bypass type (beta rating >200 @ 2 micron)
  • Return Filtration: 5 micron, bypass type (beta rating > 300 @ 5 micron)
  • 70 gallon stainless steel hydraulic reservoir with desiccant breather, drain valve, and air removal system
  • Large forced air cooler (20+ HP heat removal) hydraulic heat exchanger, thermostat controlled cooling system
  • Convenient hangers and trays to hold and contain the hydraulic hoses when not in use on the aircraft
  • 24 volt, dual battery for cold weather starts
  • Engine block and grid heater cold weather system
  • Reservoir Service/Component Testing: Manual two stage hand pump (high volume / 5000 psi) with 2 micron, non-bypass type (beta rating >200 @ 2 micron) pressure filter
  • Ruggedized frame with enclosed fork lift tubes and 10,000 lb tie down rings
  • Running gear rated for 8500 lbs. and 10 mph, Four wheel Ackerman steering with leaf spring trailer towing system with two wheel parking brake
  • Bright LED lighting on engine and hydraulic instrument panels, and unit corner lights for night operation
  • Large 35 gallon fuel tank for 12+ hours of use
  • Hydraulic fluid sample port for contamination testing
  • Quiet Operation: Less than 85 dbA at three feet noise level
  • Easy access, light weight, removable pin hinged panels for full access to all maintenance components
  • Corrosion resistant galvanized sheet metal and resistant stainless steel hardware
  • CE Marked
  • Powder coated (and Jet-Glo) Skydrol and UV resistant painted steel panels
  • Finish: Durable Powder Coat Tronair Blue

Standard Safety Features

  • Hydraulic high and low reservoir shutoff feature with LED warning and indicating lights (panel and stack)
  • Hydraulic high temperature shutoff feature (160 degree F) with LED warning and indicating lights (panel and stack)
  • Engine no fuel and low fuel, high temperature, and low oil pressure LED indicating lights (panel and stack)
  • Lubricity and fuel/water separator with water-in-fuel (WIF) sensor
  • Low coolant shut down system
  • Pressure filter clogging indicator LED light with reset button
  • Pressure gauge calibration port for (on unit) calibration with safety shut-off valve
  • Emergency stop button, system pressure relief valve, maintenance only access panels, return system pressure relief valve, automatic warning and shutdown systems
  • Fire extinguisher


  • Length: 130.31 (331) in (cm)
  • Width: 83.5 (212) in (cm)
  • Height: 81.75 (207.6) in (cm)
  • Weight: 8500 (3856) lb (kg)
Compatible Aircraft*
Boeing727-200, 737-100, 737-200, 737-300, 737-400, 737-500, 737-600, 737-700, 737-800, 737-900, 737-BBJ, 737-BBJ2, P-8 Poseidon
EmbraerERJ-170, ERJ-175, ERJ-190, ERJ-195, Lineage 1000
GulfstreamG450, G500, G550, V, VSP
*This list is for general reference only and may not be entirely acurate for all aircraft. Please confirm all equipment meets the requirements of your aircraft with the owners/maintenance manuals prior to purchasing or using with your aircraft.

We service the 673A and other items like it at our facility.

A few of the common services we offer for this item are:
• Overhaul
• Repair
• Troubleshoot & Service

As an authorized Tronair Distributor, we sell factory OEM parts for the 673A. Not sure exactly what part you need? Just describe it or send us a photo and we will research it for you if needed.

A few of the common parts we offer for this item are:
• Return Hose
• Pressure Hose
• Hoses Inside of Unit
• Pressure Gauge
• Hand Pump Pressure Gauge
• Hand Pump
• Flow Meter
• Pyrometer
• Hourmeter
• Pressure Filter
• Return Filter
• Hand Pump Filter
• Casters
• Floor Lock
• AC Input Cable

We provide short-term and long-term rentals for the 673A. We will ship the item directly to you and arrange for pickup at the end of your lease.

Sell or Trade-In

We can purchase your used 673A (or similar GSE items like it) and apply it as a credit for new GSE, or buy it outright directly.