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The durability test of tractor hydrostatic pump type UD 25 under operating load

Author

Listed:
  • Š. Drabant

    (Department of Transport and Handling, Faculty of Agriculture Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)

  • J. Kosiba

    (Department of Transport and Handling, Faculty of Agriculture Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)

  • J. Jablonický

    (Department of Transport and Handling, Faculty of Agriculture Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)

  • J. Tulík

    (Department of Transport and Handling, Faculty of Agriculture Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)

Abstract

The results of the UD 25 hydrostatic pump durability test are presented; they were obtained in the laboratory under operating load. The test of operating load was a continuation of the hydrostatic pump durability test with a cyclic pressure loading according to the norm STN 11 9287. It lasted 300 hours, with 70°C ± 2°C of hydraulic fluid temperature. The aim of the test was to simulate the operation of the hydrostatic pump under load in laboratory and to find out its deterioration and the influence of a biodegradable fluid on its qualities. The achieved results confirmed that flow efficiency of the UD 25 hydrostatic pump decreased only to 3.6% which points to its good technical state even after the test performance. Meanwhile we can state that the used ecological hydraulic fluid on the basis of a vegetable oil "Environmentally responsible tractor transmission oil", produced by the Slovnaft company, Inc., is characterised by very good qualities.

Suggested Citation

  • Š. Drabant & J. Kosiba & J. Jablonický & J. Tulík, 2010. "The durability test of tractor hydrostatic pump type UD 25 under operating load," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 56(3), pages 116-121.
    • Handle: RePEc:caa:jnlrae:v:56:y:2010:i:3:id:42-2009-rae
    DOI: 10.17221/42/2009-RAE
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    Cited by:

    1. J. Kosiba & Z. Tkáč & Ľ. Hujo & B. Stančík & I. Štulajter, 2013. "The operation of agricultural tractor with universal ecological oil," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 59(SpecialIs), pages 27-33.
    2. Ľ. Hujo & Z. Tkáč & J. Tulík & J. Kosiba & D. Uhrinová & M. Jánošová, 2016. "Monitoring of operation loading of three-point linkage during ploughing," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 62(1), pages 24-29.

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