TD for distribution transport

TD Mechanical Steering System

The TD steering arrangement is a mechanical system which is used primarily in distribution transport. This system steers the rear axle of a one, two or three axle trailer.

The TD steering system allows the operator to make more efficient use of his trailer through improved manoeuvrability, making inner city deliveries easier and providing the ability to negotiate small roundabouts on urban roads.

Savings on

  • Amount of runs due to larger vehicle
  • Time, through better manoeuvrability
  • Fuel consumption
  • Tyre wear
  • Accessibility
  • Vehicle damage

Steering principle

While making a turn, the movement between the truck and trailer is transmitted by the fifth wheel plate, locked into the fifth wheel coupling by the steering wedge. The steering bar transmits this steering motion directly and without any play to the axle mounting frame.

TD for distribution transport


  • A TD system enables you to steer the rear axle on a 1 to 3-axle trailer.
  • RDW test report according EEC guideline (70/311) for most common TD configurations available at request (no. 56210026).
  • Special TRIDEC spline bolts used for most bolt connections. No loosening of bolts and re-tightening not necessary.
  • Gross Weight: 575-800 kg. Net weight of steering system is reduced due to the replacement of a conventional rubbing plate with the TRIDEC unit and modifications to rear of chassis to accommodate the turntable.
  • Possible steering angles are 26/28/30/32/36/40 degrees.
  • Also 21º is possible with mounting height of 140 mm.
  • Components: fifth wheel unit, steering bar and axle mounting frame.