PRONAR T680, Operator'S Manual, Page: 63 / 147

SECTION 2 Pronar T680
3.17
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system for unlocking the left side walls,
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system for unlocking the walls on both sides of the trailer.
The front side walls are unlocked using hydraulic cylinders (3) - figure (3.11)installed in the
front wall. The rear side walls are unlocked by delivering the oil to the cylinders (4) placed at
the rear part of the upper frame. The system is supplied with oil from the tractor's hydraulic
system. The system is controlled by means of the oil manifold of the tractor's external
hydraulic system.
TIP
The hydraulic wall unlocking system is filled with L-HL32 Lotos hydraulic oil.
3.2.6 FEEDER UNIT
The trailer can be additionally equipped with a hydraulic feeder – figure (3.12) - installed on
the trailer's rear wall in the chute opening. The feeder facilitates precise unloading of loose
materials, without the necessity of load box rising.
Folding feeder (1) is located in the guides (4) and secured in unfolded position by means of
pin (8). The feeder is raised and lowered by means of manual winch (5) located on the
trailer's rear wall. The winch raises the feeder (to working position) or lowers it (to transport
position) by means of cable (9). Additionally, the end part of the feeder can be folded, which
considerably facilitates transport of the trailer with the feeder.