Technical Specs

Total Max Pump HP 425
Max HP Per Tower 360
Max Clutch Torque 7,200 lb-ft
Max Clutch HP 1,600
Max Engine Speed 2,250 rpm
Min System Pressure 400 psi
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Features of the HPTO®21

Microprocessor Controlled Hydraulic Clutch

PT Tech's HPTO®21 with its Power Tower pump drive is available for both inline and belt driven applications. In addition, the HPTO®21 comes with PT Tech's newest controller the Advanced 3. Together they provide the best and strongest clutch package available for diesel engines up to 1600hp. The Power Tower provides 4 pump pads with a combined 425 horsepower capacity.

Clutch Controller

The HPTO® microprocessor-based clutch controller eliminates the typical service problems that are associated with operator abuse. The patented start-up sequence brings the driven load smoothly up to engine speed automatically compensating for the power required, optimizing peak engine torque. This means the HPTO21 can start equipment with significant inertia or even under partially jammed conditions. The HPTO®21 package increases equipment reliability and profitability by preventing operator abuse. The controller is also SAE J1939 capable allowing it to connect into the machine's CAN BUS system.


  • 4 Hydraulic pump pads
  • SAE B&C pump pad configurations are standard; A,BB & D pump pads are optional
  • SAE O housing is standard, SAE 1 housing is optional
  • Designed to use a variety of readily available torsional couplings for flywheel connection.(not included)
  • Compact design-Overall length is 35.75 in.