PRONAR T386, Руководство оператора, Страница: 58 / 162

Pronar T386 SECTION 3
3.16
reduces load applied to the trailer structural elements, reduces terrain damage and tyre wear
as well as improves the comfort of driving the tractor with the trailer.
Two external steering axles are equipped with cylinders (3) and (4) – figure (3.12) connected
to double-acting cylinders (1) and (2) located on the right side of the drawbar by means of
hydraulic conduits and pipes creating a closed-circuit. The drawbar's cylinders are connected
with the string by means of a lever. The string's ball-shaped end is connected with the
tractor's hitch which meets the requirements of ISO 26402 standard.
FIGURE 3.12 Diagram of the hydraulic steering system
(1) front axle steering cylinder, (2) rear axle steering cylinder, (3) front axle cylinder, (4) rear
axle cylinder, (5) hydraulic accumulator, (6) pressure gauge, (7) hydraulic valve, (8) hand
pump
The system is filled with oil in the amount of approximately 7 litres. The reference list of oils is
included in ANNEX B to this publication. During movement of rods of cylinders (1) and (2), oil
in the system flows to steering cylinders (3) and (4) on the external axles and causes turning
the trailer's wheels. Rods of cylinders (1) and (2) move when the trailer's drawbar changes its