Instruksjonsbok Volvo A25D - A30D

Steering System

7

3

5

1

6

2 4

Volvo’s articulated steering system is a true self- compensating hydro-mechanical design, which provides a very good “feel” for the road. A steering system that maintains its controllability and precision throughout the life of the hauler is essential not only to maximize production, but also for safe, high-speed operation. Volvo has accomplished this with its unique self-compensating, hydro-mechanical steering system. The steering system is supplied with oil from variable displacement piston pumps (1) and a ground depen- dent pump (2). The steering valve (3) controls oil sup- ply to the steering cylinders (4) , and a damping valve (5) ensures that impacts and jolts are not transmitted to the steering wheel. The rack & pinion (6) , together with the mechanical steering linkage, ensures that the steering angle is always proportional to the number of turns of the steering wheel. A mechanical feedback rod (7) , connected to the hitch at one end and the steering valve at the other, acts to center the steering valve after any steering movement, providing a smooth, accurate and steady automotive-type feel to the steering system.

Advantages - steering system • Unique self-compensating, hydro-mechanical steering system for safe high-speed operating accuracy. • Articulated steering with good maneuverability and a small turning radius for excellent off-road mobility. • Hydro-mechanical steering provides a very good feel for the road. • Variable displacement piston pumps conserve power and reduce fuel consumption. • Hydraulic damping minimizes impact and jolts to the steering wheel and operator. • Secondary steering is standard. • Reliable malfunction indication to ensure safety.

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