1975-02-01

Application Considerations with the Cummins Sundstrand DMT-25 Hydromechanical Transmission 750732

A fully automatic hydromechanical transmission has been successfully applied in a variety of heavy duty trucks and is now being offered by numerous truck manufacturers. Significant differences in application and installation technique exist between a hydromechanical transmission and fixed ratio truck transmissions. This paper discusses major application and installation considerations with the hydromechanical transmission and also suggests new approaches for engine/transmission package optimization, governor control interface improvements, and increased vehicle productivity.

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