PRONAR T286 Operator's Manual page 58

Pronar T286 SECTION 3
FIGURE 3.13 Design and diagram of the hydraulic system of the straight support
(1) hydraulic cylinder, (2) spring, (3) valve, (4) support foot, (5) quick coupler - plug, (6) plug
cap (red), (A) valve in open position, (B) valve in closed position
The trailer can be equipped with straight hydraulic support – figure (3.13)or folding hydraulic
support – figure (3.14).
Unfolding and folding the support is done by extending or retracting the hydraulic cylinder rod
(4). If the valve handle (3) is shifted to position (B), the support is locked in fixed position. The
support is lowered by shifting the valve handle to open position (A), i.e. along the valve.
Hydraulic oil supplied from the tractor's hydraulic manifold extends the cylinder rod to a
desired height. Return of the straight support to transport position is done by setting the
tractor manifold section to floating position and is accomplished by means of springs (2) –
figure (3.13). The hydraulic conduit for controlling the support is terminated with a quick
coupler - plug (5) and protected by means of a cap (6).
In case of the folding support, the support return spring is located inside the cylinder sleeve
(2) – figure (3.14). The support is locked in transport position (folded) or in parking position
(unfolded) by means of interlock pin (4).
3.18