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The difference between fully hydraulic and hydraulic power steering gears is the
first substitutes the mechanical elements such as steering gear and longitudinal tie etc and
has high pressure oil pipe connecting fully hydraulic steering gear with oil cylinder. The
pressure-gradient control valve mounted in the loop of load- sensing and fully hydraulic
steering system can ensure distribution of flow to steering system first and sufficient oil
supply at any working conditions. There is less flow passing through steering gear when
it is at neutral position to save the energy.
3.3 Composition of Steering System
(1) Control mechanism of steering
Fig. 3-1 Steering control device
The control mechanism of G-series forklift of 1.0-3.5t mainly consists of steering
wheel, tubular column, coupling, steering gear and mounting support etc (as shown in
Fig.3-1). They are fixed on the instrument panel by mounting support, steering wheel,
tubular column and coupling are connected together. The steering gear is fixed at the
lower end of coupling and the rotation of steering wheel will bring along the steering gear.
Adjustment of handle can adjust the steering wheel to the comfortable position that
drivers feel.
(2) Steering gear
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