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New John Deere Industrial Transmission
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English
Abstract
This paper describes some of the design criteria, major components, unique features, hydraulic circuitry, and durability testing used to develop a new power shift transmission for the JD844 Front End Loader.
The planetary pack with four forward and three reverse speeds, drop train gears, output shaft with a parking collar and hydraulic valving were designed to fulfill the JD844 requirements.
High torque and energy capacity along with a new pressure modulating valve provides smooth and rapid shuttle shifting from this transmission at full power, which is vital to the productivity of the JD844 Loader.
Extensive laboratory, dynamometer, and field testing has proven the performance and reliability of the JD844 Loader transmission.
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Authors
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Citation
Harvey, J., "New John Deere Industrial Transmission," SAE Technical Paper 790524, 1979, https://doi.org/10.4271/790524.Also In
References
- Von Fumetti Cyril W. “A New John Deere Four Wheel Drive Loader,” Paper No. 790532 SAE Earthmoving Industry Meeting Peoria, Illinois April 1979
- Browning E. Paul “Design of Agricultural Tractor Transmission Elements,” ASAE Distinguished Lecture Series - Tractor Design No. 4 Winter Meeting Chicago, Illinois December 1978
- Dunn James K. Lang Dan D. “Applications of Field Loading to Laboratory Power Train Tests,” Paper No. 730817 SAE Off-Highway Vehicle Meeting Milwaukee, Wisconsin September 1973