A detailed description is given of the two new versions of the friction retarder being introduced into heavy commercial vehicles. The retarder, an oil-cooled multi-brake can be mounted on the gearbox, the differential or the propeller shaft. Used in conjunction with the wheel brakes it can reduce the rate of wear of normal brake linings to one quarter. It is normally air driven but can be electrically or mechanically actuated. Constructional details are given of the original s type, the first model produced, and the modifications introduced in the drive-line mounted M type and the g and a types which are gearbox and axle mounted are also described. The design and function of the oil system is discussed. The engine coolant system is normally sufficient to dissipate the heat generated, but a separate heat exchanger may be needed in some cases. The purpose of the control valve and its operation is explained. /TRRL/

  • Availability:
  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • GARRETT, K
  • Publication Date: 1978-10-11


  • English

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 45-46
  • Serial:
    • Volume: 3
    • Issue Number: 5
    • Publisher: Institution of Mechanical Engineers
    • ISSN: 0307-6490

Subject/Index Terms

Filing Info

  • Accession Number: 00189558
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 12 1979 12:00AM