PRONAR T743, Operator'S Manual

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Pronar T743 SECTION 3
3.20
trailer is unhitched from the tractor. There is no possibility of pressing this push-button if
pneumatic connections are connected to tractor.
FIGURE 3.16 Loosening-parking valve
(1) loosening-parking valve, (2) black push-button, (3) red push-button, (4) information plate
Red push-button controls operation of parking valve. In the trailer that is correctly hitched to
the tractor by means of connections (red and yellow), the black push-button of the loosening
valve should be pulled out. Braking of the trailer wheels is carried out by pulling out the red
push-button (3). Location of individual push-buttons is shown on the plate (4).
3.10 HYDRAULIC STEERING SYSTEM
Hydraulic steering system is designed for controlling the wheels of the trailer front and rear
axles. The solution applied has a beneficial effect on improvement of machine steering
characteristics and it reduces load applied to the trailer structural elements as well as
reduces terrain damage and tyre wear.
Hydraulic accumulators (6) are used in order to eliminate minimal swing of directional
cylinders and reduce load applied to the system during turning.