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SECTION 3
Pronar T669
FIG. 3.10
Design and diagram of the shear type support hydraulic system
(1), (2) hydraulic conduit, (3) support leg, (4) hydraulic cylinder, (5) support arm, (6) hydraulic
lock
3.2.6 TAILGATE HYDRAULIC SYSTEM
Tailgate hydraulic system is used to raise and lower the trailer tailgate and control the
operation of locking hooks (4).
The hydraulic system is supplied with oil from the tractor hydraulics. Through hydraulic
conduits (2) terminated with quick-couplers pressurised oil is fed to hydraulic cylinders (1),
which open or close the tailgate.
Tailgate is controlled from the cab through the hydraulic manifold valve lever on the tractor.
When raising the tailgate the locking hooks (4) unlock the tailgate, then cylinders raise it by
with two wings (5). When closing the tailgate, cylinders lower it and in the final stage locking
hooks (4) lock it securely.
3.15
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