TRIDEC TF Mechanical Steering System

Mechanical
Steered Axle

Mechanical steering for trailers with king-pin steered axles
Steers 1, 2 or 3 axles on a 1- to 5-axle trailer
Direct, play-free steering via the fifth wheel unit and steering rods
10 t axle load; 15 / 20 / 26.5 t fifth wheel load
Steering angles up to 40° (the axle is the limiting factor)
TF-V gooseneck and lightweight TF-D versions available

Built for King-Pin Steered Axles

The TF steering system is mainly installed when space for the large wheel movement of turntable steering systems is limited, such as on concrete mixers, semi-low-loaders and exceptional designs. It combines an affordable and reliable mechanical steering system with the packaging advantages of a king-pin steered axle.

Concrete mixers, semi-low-loaders and exceptional designs
One, two or three steered axles, optionally combined with rigid axles
TF-V for semi-low-loaders, matched to the shape of the gooseneck
TF-D lightweight system for flatbed trailers with a single steered axle

Designed for Better Manoeuvrability

Superior manoeuvrability in confined spaces

Steers 1, 2 or 3 axles on a 1- to 5-axle trailer
Can be combined with one or more rigid axles
Steering angles up to 40°, with the axle as the limiting factor
Easier inner-city deliveries and small roundabouts on urban roads
More efficient trailer use through improved manoeuvrability

Lower operating costs

Time through better manoeuvrability
Fuel consumption
Tyre wear
Vehicle maintenance
Vehicle damage

Direct, play-free mechanical steering

Motion via the fifth wheel plate and TRIDEC steering wedge
One or two steering rods transmit movement to the rear axle-units without play
Axle-units steer the king-pin axles via track rods
Fifth wheel loads 15 / 20 / 26.5 t; 10 t axle load
RDW test report per EEC R79 for common TF configurations up to 3 steered axles (no. 56210113)
JOST turntable with TRIDEC spline bolts — no re-tightening required
Maintenance-free ball joints and steering rod supports against bending and chattering

Flexible versions and easy installation

TF-V: fifth wheel unit length and transfer lever height designed to match the gooseneck
TF-D: rectangular steering bar links the fifth wheel unit directly to the axle-unit, from 310 kg
TF-D suits extra low trailer necks; versions TD-K, TD-T and TD-G
Chassis centres 980 / 1,200 mm (15 and 20 t) or 1,060 mm (26.5 t)
Mounting profiles welded into the chassis for simple, quick installation
‘Sealed for life’ bearings; easy alignment via adjustable rod length
KTL-treated axle-units; galvanised steering rods