- Corporate Headquarters
- 9953 Broadway · P.O. Box 409
- Irwin, PA 15642
- Phone: 724-864-8900
- Fax: 724-864-8909
- info@irwincar.com
Phillips Group
Steering Options
Caster Steer
There are numerous methods of positioning swivel and rigid wheels; shown above is the most common arrangement, the two swivel front and two rigid rear. This is normally used on smaller and hand-powered units. Stability is excellent, as corners of unit are supported at all times.
Fifth Wheel Steer
The most common arrangement for power -drawn wagons. Single pivot point of front bolster and fifth wheel assembly has good maneuverability and simplicity of design. Stability is good and this "Standard" type has wide versatility.
Four Wheel Steer
For applications of limited aisle space and "Train-Type" towing of multiple units. Cross-connecting tie bars are synchronized to turn unit in minimum amount of area. This type of unit can be furnished with a removable tongue which allows towing in either direction by a quick tongue change. Overall stability is less than caster, fifth-wheel, or automotive type. Also supplied without tie bars and with locking pins and removable tongue for "Double Fifth Wheel" steer if desired.
Automotive Steer
For excellent stability on larger units. Towing tongue pivots, in place, as well as each set of front wheels. Wheels are synchronized with tie bar to turn correct amount for each individual radius, thus providing an easy rolling unit with no scuffing.
Four Wheel Automotive Steer
Combines the maneuverability of four wheel steer with the stability of automotive steer to offer maximum performance.
All Wheel Synchronized Steering
When capacity, height restrictions, or ground loading considerations dictate more than four wheels, but maximum maneuverability is still required, then all wheel synchronized steering is what is needed. This unit is more complex, but has smooth and scuff free steering.
Turning Radius - Illustrated
The illustration below demonstrates a comparison between two wheel or single end automotive steer, and four wheel automotive steer. The trailers shown in the two diagrams are of the same size and wheelbase. Note the drastic reduction in turning radius provided by the four wheel automotive steering.
Four wheel automotive steer units virtually turn around on themselves.
As two wheel steer units drive around in a circle, their outside front corner juts out away from center.
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