Power Test, LLC

850 Series

Transmission and Hydraulic Component Test Stand

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A versatile test stand designed for testing heavy-duty off-highway hydraulic components, the 850 Hydraulic Test Center features some of the most advanced technology on the market today. Designed for complete hydraulic pump, motor, and transmission testing, the 850 is much more than a standard transmission test bench.

The 850 provides a durable and reliable platform for performance testing transmissions, torque converters, gear pumps, vane pumps, hydrostatic pumps and hydraulic motors, cylinders, and valves. Performance testing results in reduced operating costs due to rebuilding error and possibility of critical failure in the field; equipment dealers can realize more profitable maintenance contracts and increased customer satisfaction. Additionally, the 850 features an independent closed loop hydrostatic drive for a contamination free drive system, independent constant display digital instrumentation for easy readability, and industrial grade glycerin filled pressure gauges.

Capable of detecting shift points and mechanical binding, identifying vibrations, diagnosing and locating leaks, and measuring pressure and flow, clutch leakage and output torque (optional), the 850 Hydraulic Test Center is one of the most comprehensive hydraulic testing tools on the market.

  • 200 hp (149 kW) Electric Motor (300 hp (224 kW) motor upgrade available)
  • On-site Training and Commissioning
  • Interior Soundproofing
  • 3-Micron Kidney Loop Filtration System:
    • Dedicated circulation pump and motor
    • Filtration system includes electronic indicators
  • Power Lift Assembly:
    • Facilitates easy maneuvering of the hydraulic drive motor/drive shaft for alignment with the test component
  • Safety and Maintenance Features:
    • Rear door access and ample interior lighting for added visibility and safety during maintenance
    • Roof access to filters for easy maintenance
    • Multi-location ladder for convenient machine-top access and maximum safety
    • Polycarbonate Sliding Safety Shield – Used to protect operator from fluid splash and small projectilies


  • PowerNet TD Data Acquisition and Control
  • Optional Rectifier Manifold
  • Output Load, Eddy Current Absorber and Stan
  • Main Reservoir heater to warm oil to preset temperature
  • Closed-Loop Cooling Kit (designed for converter flow cooling)
  • High Pressure Flow Cicuit with Pilot Flow Circuit
  • Super Charge Flow Cicuit

Low Flowmeters

Testing Capabilities
  • Heavy-duty
  • On-highway
  • Off-highway
  • Cross-drive
  • Inline automatic transmissions
  • Gear Pumps
  • Vane Pumps
  • Hydrostatic Pumps
  • Motors
  • Cylinders
  • Valves
Parameters Measured

Automatic Transmissions and Torque Converters

  • Check and set shift points (automatic)
  • Full and closed throttle upshift and downshift test (loaded or unloaded)
  • Downshift inhibitor test
  • Measure output torque
  • Locate shaft seal leaks
  • Identify clutch leakage
  • Check noise/vibration
  • Detect mechanical binding
  • Check main, clutch, lube and converter pressure
  • Monitor converter flow and temperature

Hydraulic Components

  • Flow & pressure
  • Torque requirements
  • Case leakage
  • Noise & vibration


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Product Specifications

Electric Electric Motor Selections (other voltage options available on request) Test centers utilize a wye-delta starting method to reduced motor startup voltage. A soft-start option is also available. NOTE: Main Power Disconnect (provided by others) must use time-delay slow-blow fuses or a breaker with an adjustable over-current setting. 850-200 200HP (150 kW) 460V/60 Hz – 350 Amps
165HP (125 kW) 380V/50 Hz – 350 Amps
850-300 300HP (225 kW) 460V/60 Hz – 500 Amps
250HP (185 kW) 380V/50 Hz – 500 Amps
Hydrostatic Drive System Direction CCW & CW
Max Speed 4,000 rpm
Max Torque 777 lb-ft (1,053 Nm)
Max Torque Speed Range 850-200 0-1,422 rpm
850-300 0-1,922 rpm
Max Pressure 6,000 psi (41,269 kPa)
Pump Displacement 850-200 130cc
850-300 180cc
Motor Displacement 160cc


Diagnostic Flow Loops Loadable 150 gpm 0-150 gpm (0-568 lpm), 0-6000 psi (41,369 kPa) flow loop with manual load valve and 6,000 psi (41,369 kPa) gauge for monitoring pressure.
60 gpm 0-60 gpm (0-227 lpm), 0-6000 psi (41,369 kPa) flow loop with manual load valve and 6,000 PSI (41,369 kPa) gauge for monitoring pressure.
Non-loadable 60 gpm 0-60 gpm (0-227 lpm), 0-2500 psi (17,237 kPa) flow loop and a 3,000 psi (20,684 kPa) gauge for monitoring pressure.


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