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Power Shift Transmissions

Twin Disc Transmissions for Hydraulic Fracturing

Choose Twin Disc automatic transmission systems for heavy-duty stationary and vehicular applications.  Sewart is the largest Twin Disc Supplier & Service company in the world.  We have worked with our customers that focus on building and maintaining hydraulic fracturing units, trucks and spreads for completions purposes in the shale plays thought out the oil & gas industry.  Twin Disc has specifically designed several of their power shift transmission units to improve pressure control for hydraulic fracturing.    

Get the job done with precise propulsion control and optional power-splitting. Promote high productivity and low downtime with robust construction, advanced technologies and easy, reliable operation. Custom solutions solve your transmission challenges—and Twin Disc and Sewart service ensures continuing success.


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TA90-7500

Sewart supplys the Twin Disc "7500" Power Shift transmission which is designed specifially for the Hydraulic Fracturing units. This transmission unit is the original technology designed to increase horse power and lower downtime.

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TA90-7601

Sewart supplys the Twin Disc "7601" Power Shift transmission which is designed specifially for the Hydraulic Fracturing units. The transmission is used to generate improved pressure control tools and increased horse power.

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TA90-8501

Sewart supplys the Twin Disc "8501" Power Shift transmission which is designed specifially for the Hydraulic Fracturing units. This unit is designed for 10,000 to 15,000 hours of runtime in harsh conditions with consistant horse power.

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TA90-8703

Sewart supplys the Twin Disc "8703" Power Shift transmission for Hydraulic Fracturing units. This unit's efficient gear train combined with electronic controls is designed for up to 15,000 hours of runtime with litte maintenance

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